13 of the most famous kids in college this semester

Best known for the Nickelodeon shows "iCarly" and "Drake and Josh," as well as the film "School of Rock," Cosgrove is now a student at the University of Southern California.

"The weirdest part is after a day at school, I'll go on Instagram or the Internet and there will be pictures of me from school that random people took and I didn't know they took," Cosgrove told ABC News.

The actress is majoring in film and trying to emulate her heroes Tina Fey and Kristen Wiig, eventually hoping to write, direct, and act in her own work.

Ledecky delayed her college enrollment for a year to concentrate on training for the Rio Olympics. With a handful of world records and four gold medals under her belt this year, she started school at Stanford this fall.

Given her strong showing in Rio, Ledecky could have made $5 million annually in endorsements if she went pro, according to Olympic sports marketing expert Bob Dorfman. She decided not to go that route. At Stanford, she has Olympic medalists Simone Manuel and Lia Neal as swimming teammates.

In Rio this year, Manuel got the United States its first gold medal in the women's 100-meter freestyle in decades, and was the first African-American woman to win a gold medal in an individual swimming event for the United States.

"You have to work hard and be pretty smart to get into a school like this," Manuel told USA Swimming. "I wanted to be in this atmosphere and challenge myself."

Her roommate? Katie Ledecky.

Now a senior at Stanford, Neal also competed at this summer's Rio Olympics. She earned a silver medal in the 4x100-meter freestyle relay, after winning a bronze in the same event four years earlier.

At Stanford, she was roommates with Maya DiRado, another medal-winning Olympian, who graduated last spring. They were in a suite with other swim team members, like Katie Ledecky and Kathleen Baker.

"Everyone in my suite has at least one medal, which is pretty cool," Neal told Cosmopolitan.

After starring on hit sitcom "Two and a Half Men" for 10 seasons — as the highest-paid child actor at the time, no less, making $350,000 an episode — Angus T. Jones left the show, calling it "filth." He now dedicates his life to Christianity.

Now a student at the University of Colorado at Boulder, he also tours the country speaking at churches.

Canadian actor Alexander Ludwig played the ruthless District 2 tribute Cato in the first "Hunger Games" movie — he's the one who fights Peeta and Katniss on top of the cornucopia in the final fight scene. Since then he's been balancing a flourishing film career with his studies.

A senior, the Phi Kappa Psi brother and theater major belongs to one of USC's most exclusive fraternities.

Snoop Dogg's son used to play football at UCLA earlier this year after he received more than a dozen offers from other colleges. Earlier this year, he left the team to pursue other passions, but he's still a student at the university.

Broadus is also the CEO of Film School Productions, a company for product placement in film and photography.

Like her actor dad, Jamie Foxx, Corinne Foxx has been appearing in the red-carpet spotlight from a young age.

The 20-year-old is a cheerleader and public relations major and member of Pi Beta Phi sorority at the University of Southern California. But she still finds time to party with Beyoncé and dish on her style for W magazine.

She also models for LA Models and Select Models London, and she recently studied abroad in Europe, according to her Instagram.

The young redhead originally deferred her enrollment at Stanford for a year in order to pursue her budding acting career, and it paid off when she landed the part of a lifetime as Foxface in the first "Hunger Games" movie.

When she's not in class, Emerson is working on SHE'S SO BOSS, a movement to empower young women, which she cofounded during her gap year.

She also runs a personal YouTube channel where she debuts music covers and answers fan questions.

Madonna's daughter, Lourdes Leon, is a junior studying at the University of Michigan's School of Music, Theatre, and Dance.

Lourdes, aka Lola, is actually following in her mother's footsteps — Madonna herself attended the school before leaving to pursue pop stardom. Madonna'a advice to her daughter: "Try to do everything in moderation. Try not to kill all your brain cells. And try to go to class."

Everybody's favorite "That's So Raven" star is the latest Disney Channel celeb to hit the books. Raven-Symoné started her studies in 2014 after excitedly instagramming a photo of her student ID at the Academy of Art University in San Francisco.

The star is 30 and working hard to balance her studies and her cohosting gig on "The View."

Fanning started New York University's Gallatin School of Individualized Study in fall 2011, and she's "on the brink of graduating," according to Teen Vogue.

"They’ve been very flexible with my schedule and allowed me to do independent studies and take classes and sort of come in and out," the "War of the Worlds" actress told Indiewire. "Everybody’s been very understanding and supportive of that. It’s kind of what Gallatin was founded upon, so it’s really worked for me."

Fanning has also been using her perch to talk about inequality in the entertainment industry.

"It’s frustrating that you still have to talk about it," she told Elle. "As part of my school, I’ve studied lots of different periods, and if you go back to, like, The Taming of the Shrew, it’s talking about the disparity between genders, and it’s crazy that we still haven’t cracked that."