Ryan Kwanten Launches Prince of Persia

True Blood hunk Ryan Kwanten keeps it casual in a simple Philip Lim tee at the launch of the new Prince of Persia video game held at West Hollywood’s Sky Bar on Tuesday (May 25)

At the event presented by Ubisoft and Break Media, actresses Zelda Williams and Sara Paxton rubbed shoulders with celeb photog Tyler Shields, Nick star Robbie Amell and G4′s Olivia Munn.

Ryan and Rachel Bilson actually attended a Phillip Lim dinner earlier this month.

Prince of Persia, starring Jake Gyllenhaal, opens in theaters TOMORROW (May 28).

20+ pictures inside of Prince of Persia host Ryan Kwanten…