Colin Firth
Before winning an Oscar the dreamy Brit acted as Bynes' dad in What A Girl Wants.
Channing Tatum
Tatum and Bynes played on the same soccer team in She's the Man.
Zac Efron
The former Disney star and the former Nickelodeon star showed off their dance moves in Hairspray.
Penn Badgley
The Gossip Girl star joined Bynes on screen in Easy A.
Jonathan Bennett
Jonathan was costars with— not one!—but two wild stars. He worked with Lindsay Lohan in Mean Girls and Bynes in Love Wrecked.
James Marsden
Marsden and Bynes busted a move together in Hairspray.
Cam Gigandet
The former Twilight star played Bynes' cheating boyfriend in Easy A.
Nick Zano
The actor shared the small screen with Amanda for five years on the TV show What I Like About You.
Chris Carmack
The Nashville star was Byne's love interest in Love Wrecked.
Jackson Hurst
The former Drop Dead Diva actor was also in Byne's Lifetime movie Living Proof.