The ups and downs of Amanda Bynes

Amanda Bynes has been famous since landing a role on Nickelodeon's sketch comedy show "All That" at age 10. But in recent years she's been better known for legal trouble and tweeting strange statements and photos, leading to speculation about her mental health. In October 2014, that speculation continued as disturbing tweets were posted to Bynes' account containing allegations of abuse. Here's a quick timeline of Bynes' life and career:

Amanda Bynes became a superstar among the elementary-age crowd starting in 1996 as a member of the Nickelodeon show "All That," on which she memorably played a sweet young lady full of rage during the "Ask Ashley" skit.

By 1999, Bynes had become popular enough to host her own show. Nickelodeon put her at the center of the "All That" spinoff, "The Amanda Show."

By 2002, Bynes parted ways with her Nickelodeon shows and transitioned into movies. She starred in "Big Fat Liar" that year and followed it up with 2003's "What A Girl Wants."

Bynes landed not only a hit TV series with "What I Like About You," on which she starred with Jennie Garth from 2002 to 2006, but also reportedly a new boyfriend. Bynes and co-star Nick Zano reportedly began dating in 2003.

Between 2005 and 2007, Bynes steadily worked in film in addition to her TV sitcom. Seen here at the premiere of her 2005 animated movie "Robots," she also starred in "Love Wrecked" (2005) and a comedy with Channing Tatum, "She's The Man" (2006).

In 2007, Bynes starred in a summer hit with the remake of "Hairspray," which also featured John Travolta, Allison Janney (seen here), Zac Efron, Queen Latifah and Nikki Blonsky.

While working on movies like "Sydney White," Bynes' personal life also took the spotlight. She was briefly linked to athlete and reality star Doug Reinhardt, here at a Los Angeles Lakers game in December 2008.

Bynes hadn't yet announced that she was through with acting when she walked the red carpet at the 2009 MTV Video Music Awards. She saved that revelation for the following June, only to announce that she'd "un-retired" by July.

Sure enough, Bynes was still acting: Her comedy with Emma Stone, "Easy A," arrived in September 2010. It is, however, Bynes' last credited film.

In April 2012, Bynes shocked fans when she was arrested on suspicion of DUI after getting into a fender-bender with police not long after her 26th birthday. The DUI charge was later dismissed in February 2014 in a plea deal that gave the actress three years on probation, a requirement to attend an alcohol education course and a fine.

Bynes, seen here in April 2012, again made headlines that June when she asked President Barack Obama on Twitter to fire the officer who had arrested her. That August, she allegedly hit another vehicle, incurring a second hit-and-run charge.

By September, Bynes reportedly had her car impounded and was cited for driving on a suspended license. Despite her legal issues and other reports of oddball behavior -- like locking herself in a dressing room and taking off her top in spin class -- Bynes told People magazine at the time that she was "doing amazing" and had plans to move to New York to work on her fashion career.

In November 2012, Bynes, who became a regular celebrity snapped by paparazzi, announced that she's a 26-year-old retired multimillionaire.

Around that time, speculation about Bynes' state began to grow as she appeared to share photos from social media accounts that were credited to the star.

Early in 2013, Bynes generated plenty of press with a new look that included long blond hair and apparent cheek piercings. In March, she nearly brought down Twitter when she seemingly sent Drake a lewd tweet.

In April 2013, the same month that Bynes turned 27, the headlines about her behavior were popping up almost daily. The news typically revolved around her reported Twitter account, where self-portraits and unsettling statements were shared.

Between her tweets and her attention-grabbing appearances in NYC, it is easy to forget that Bynes also has legal issues. She was sentenced to three years of probation for her suspended license case in early May. On May 23, she was arrested in New York after allegedly tossing drug paraphernalia out of the window of her apartment.

Bynes and attorney Gerald Shargel arrive for a court appearance in New York on July 9, 2013. She was charged with reckless endangerment and attempting to tamper with physical evidence. The case was later dismissed.

Bynes uses her dog to block her face from photographers while shopping in Chelsea on July 10, 2013, in New York City. On July 24 of that year, Bynes was detained for a mental health evaluation after being "involved in a disturbance in a residential neighborhood" in Thousand Oaks, California. She was then placed under an involuntary psychiatric hold for four months.

In December 2013, Bynes was released from an inpatient treatment facility into her parents' custody, and that same month made her first public appearance on a walk with her parents.

At the start of 2014, Bynes seemed to want a fresh start. She deleted all old tweets from her Twitter account, and instead began posting about her enrollment at the Fashion Institute of Design and Merchandising in Los Angeles. Yet by September, Bynes' was again arrested on a DUI charge. There were also more reports of bizarre behavior.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

• Amanda Bynes posted a series of strange tweets Friday


• Bynes once had promising career, has struggled in last few years


• Actress seemed to be doing well after mental health treatment


• In last month, she's had DUI arrest and made troubling statements

(CNN) -- Actress Amanda Bynes grabbed media attention Friday with a series of tweets about her father, her looks and her mental state.

It's the latest bizarre event in what has been a rough couple years for the performer, who was charged with a hit-and-run in 2012, hospitalized for treatment last year after a psychological evaluation and put on probation after a DUI earlier this year.

Bynes, 28, has been in the public eye much of her life.

Up: She was a child star

She was born in 1986, was raised in Southern California and first rose to fame as one of the stars of Nickelodeon's "All That," a sketch comedy show that also produced Kenan Thompson and Nick Cannon. Bynes, who joined "All That" when she was 10, was so popular that she got her own show, "The Amanda Show," by the time she was 13.

Before she'd turned 20, she'd co-starred with Frankie Muniz in the 2002 movie "Big Fat Liar," had a leading role in the TV series "What I Like About You" and was on the cover of Vanity Fair. She starred in the 2003 film "What a Girl Wants," a modest success.

She also was a straight-A high school student, according to an interview in Cosmopolitan.

Cannon has remained a friend and has stood up for Bynes throughout her difficulties.

"You're not alone," he wrote last year. "I'm here for you. I understand. I care and I appreciate you, because that's what family does and that's what family is for."

Up: She was on the verge of major movie success

In 2006, Bynes was named one of Teen People's hottest stars under 25, and the next year had her biggest success as Penny Pingleton in the 2007 movie version of the musical "Hairspray." She was also one of the stars of the well-reviewed 2010 comedy "Easy A."

But there was also trouble on the horizon. She signed a deal with a fashion designer to market clothes under the name Dear, but the designer went out of business. She was replaced on one movie. Another, "Hairspray 2," never materialized.

In June 2010, she tweeted she was done with acting at 24.

"I've never written the movies & tv shows I've been apart of I've only acted like the characters the producers or directors wanted me to play," she wrote. "Being an actress isn't as fun as it may seem ... I don't love acting anymore so I've stopped doing it."

Down: Her behavior became erratic

Within a month, she'd taken back her announcement.

"I've unretired," she tweeted in July, not long before "Easy A's" release. However, she hasn't made a movie since.

Relationships reportedly came and went with Nick Zano, reality star Doug Reinhardt and (briefly) Seth MacFarlane.

Then came the gossip about her own behavior. She was arrested on suspicion of DUI after getting into a fender-bender with police not long after her 26th birthday in April 2012. In August, she was accused of hitting another driver and then driving off. She was charged with two counts of hit-and-run.

In February 2014 the DUI charge was dismissed in a plea deal that gave the actress three years on probation, a requirement to attend an alcohol education course and pay a fine after she entered a no-contest plea to reckless driving.

Things became stranger. She asked President Obama on Twitter to fire the officer who had arrested her on the DUI charges. Clients at an L.A. gym reported she was acting bizarrely and talking to herself. But, she told People magazine that she was "doing amazing," and planned to move to New York to pursue a career in fashion design.

Up: After treatment, new goals

Bynes' social media posts started attracting more attention, whether they were selfies of constantly changing looks or unsettling comments about others. One of her tweets read, "If I'm not following you on twitter, I hate you."

In May 2013, she was arrested in New York after allegedly tossing drug paraphernalia out of the window of her apartment.

In July she was placed under an involuntary psychiatric hold after she was "involved in a disturbance in a residential neighborhood" in Thousand Oaks, California. She eventually entered an inpatient psychiatric facility.

Yet things seemed to improve after she was released. She moved back in with her parents, who had taken custody of her and had said she was "making great strides towards recovery" from mental illness. She hadn't always had a solid relationship with them. In 2012, People reported that she had tried to emancipate herself while working for Nickelodeon, though she never moved out entirely.

She continued outpatient treatment this year while going to school.

Down: More troubles

In late September, Bynes was arrested on a DUI charge in Sherman Oaks, California. Her arrest report noted a "disheveled appearance."

On Wednesday in New York she was nabbed by security at a clothing store for suspected shoplifting, though she was let go after signing a "no-trespass agreement," TMZ reported. She also threatened to sue InTouch magazine for writing "lies about me."

Then came Friday's tweets.

First, a series of comments were posted to Bynes' official account that day alleging the star's father was verbally, physically and sexually abusive. But within a few hours, another tweet was posted claiming that the allegations were false.

Due to the sensitive nature of the tweets, which haven't been confirmed to have been posted by Bynes herself, we're refraining from sharing them here. CNN has reached out to Bynes' parents and Bynes' lawyer, and hasn't yet received a response.

CNN's Alan Duke, Jane Caffrey and Breeanna Hare contributed to this story.