Then and now: Hollywood's most iconic child stars - These celebs rose to stardom for roles they played when they were young. Some ended up becoming incredibly successful actors, others decided acting wasn't for them.
Click here to see the 'then and now' of Hollywood's most popular child stars!

© Getty Images

Dakota Fanning - Then - This smiley star was only 11 years old when she starred in the 2005 film, 'War of the Worlds,' beside Tom Cruise. 

© Getty Images

Dakota Fanning - Now - The 24-year-old is now taking on more adult roles, recently starring briefly in 'Ocean's 8.'

© Getty Images

Lindsay Lohan - Then - Many remember seeing double of this red-headed cutie in 'The Parent Trap.'

© BrunoPress

Lindsay Lohan - Now - This child star has had some struggles in the past, but she is currently getting back in the limelight with a reported new reality show, centered around Lohan's businesses in Greece.

© Getty Images

Demi Lovato - Then - Lovato broke into the mainstream with her starring role on the Disney Channel TV movie, 'Camp Rock.'

© Getty Images

Demi Lovato - Now -

The actress has now become an international pop sensation, but it's not without its drawbacks. She was faced some serious addiction problems.

© Getty Images 

Macaulay Culkin - Then - The lead actor in the 'Home Alone' films was the star of the moment!

© BrunoPress

Macaulay Culkin - Now - The actor changed dramatically as he has been through some rough times, but he's now quit Hollywood and seems to be happier than ever.

© BrunoPress

Freddie Highmore - Then - Do you remember Freddie Highmore in 'Charlie and the Chocolate Factory' (2005)?

© Getty Images

Freddie Highmore - Now - He's grown a lot but his little boy face is still the same!

© Getty Images

Haley Joel Osment - Then - The actor was known as a child for playing Cole Sear in 'The Sixth Sense' (1999).

© Getty Images

Haley Joel Osment - Now - The 29-year-old Hollywood star changed so much it would be almost impossible to recognize him these days!

© Getty Images

Abigail Breslin - Then - The actress became a Hollywood star at the young age of 5. She rose to fame for her role as Bo Hess in 'Signs' and in 2007 became the youngest actor ever to be nominated for an Oscar for her performance in 'Little Miss Sunshine.'

© Getty Images

Abigail Breslin - Now - The has grown to become a charming and beautiful young woman.

© Getty Images

Mara Wilson - Then - Mara Wilson's popularity rose after she starred in 'Mrs. Doubtfire' (1993) and 'Matilda' (1996).

© BrunoPress

Mara Wilson - Now - She's 30 now but has decided to drop the acting career.

© Getty Images

Amanda Bynes - Then - This star was so popular in the late '90s and early 2000s that she had her own show!

© Getty Images

Amanda Bynes - Now -

Bynes has dealt with some struggles, including some mental health issues and several arrests, but may be considering a return to acting, according to People.

Check out other celebrities who have had a brush with the law. 

© BrunoPress

Bradley Pierce - Then - The actor kicked off his career in the role of Peter in classic movie 'Jumanji' (1995).

© BrunoPress

Bradley Pierce - Now - He's 40 today and has changed so much!

© Getty Images

Daveigh Chase - Then - The child star was known for her role as Samara in the movie 'The Ring' (2002).

© Getty Images

Daveigh Chase - Now - The red-headed beauty still looks absolutely stunning.

© Getty Images

Alisan Porter - Then - The actress rose to stardom after her performance in comedy film 'Curly Sue' (1991).

© BrunoPress

Alisan Porter - Now - Would you honestly say she's 41 now? She's aged particularly well.

© Getty Images

Brooke Shields - Then - The actress's role in 'Pretty Baby' (1978) catapulted her to international fame, which allowed her to play the iconic role of Emmeline Lestrange in 'The Blue Lagoon' (1980).

© BrunoPress

Brooke Shields - Now - She is totally different now at the age of 52 but more dazzling than ever!

© Getty Images

Olivia Hack - Then - The actress starred in the movie version of 'The Brady Bunch Movie' in 1995.

© BrunoPress

Olivia Hack - Now - Do you think you could tell the 39-year-old is the same person?!

© Getty Images

Mason Gamble - Then - Mason Gamble became famous for his role in 'Dennis the Menace' (1993).

© BrunoPress

Mason Gamble - Now - The actor has grown to become a Hollywood heartthrob!

© Getty Images

Hilary Duff - Then - After starring in some small TV movies and commercials, Hilary Duff had her breaking role as 'Lizzie McGuire' in the popular 2001 teen show.

© Getty Images

Hilary Duff - Now - Can you believe she's already 35?! She looks amazingly beautiful.

© Getty Images

Miranda Cosgrove - Then - Remember the adorable Summer from 'School of Rock' (2003)?

© Getty Images

Miranda Cosgrove - Now - The 30-year-old actress turned into a gorgeous young woman.

© Getty Images

Georgie Henley - Then - Georgie Henley had her movie debut at the young age of 10 in 'Chronicles of Narnia: The Lion, the Witch and the Wardrobe' (2005).

© Getty Images

Georgie Henley - Now - She's now 27 and is one of Hollywood's promising young stars.

© Getty Images

Matthew Lewis - Then - What about the nerdy but loyal Neville Longbottom from the 'Harry Potter' movies?

© Getty Images

Matthew Lewis - Now - Matthew Lewis is definitely improving with age!

© Getty Images