She played Jill Mason in the 2008 Broadway revival of Equus at the Broadhurst Theatre, which starred Daniel Radcliffe as Alan Strang.Speaking about the role, Astin said, "I had a lot of thought; I didn't even know if I was going to do Equus because of the nudity and because of the high profile [aspect] of it.
Determined and persistent, Kwanten made it through difficult first months when he couldn't find any jobs.
After several guest spots on TV shows, he was signed to play the key role of Jay Robertson on drama series "Summerland".
Balancing university and acting, he subsequently landed a part as Vinnie Patterson on Australian popular soap opera "Home and Away" which became his breakthrough role.
He remained on the show from 1997 to 2002 and then decided to head for Los Angeles with the hopes of embracing international fame.
In 2012, she was nominated for a Drama Desk Award for her performance in the Off-Broadway play All New People.