The Hangover star Justin Bartha has tied the knot in Hawaii last Saturday.

The 35-year-old actor said, "I do" to personal trainer Lia Smith, to whom he proposed in Big Sur earlier this year. The ceremony included the likes of Reese Witherspoon and her husband Jim Toth (Barth's agent), Ken Jeong (Bartha's Hangover co-star), and Jesse Eisenberg.

"They were sweet together and looked very in love. He was holding her bouquet for her and walked with his arm around her after the vows. She had a big smile on her face and nuzzled her face up to his neck. Their family and friends seemed so happy for them and had an incredible time hanging out in Hawaii leading up to the wedding. It was a destination wedding for all," an eyewitness said.

Bartha previously dated Ashley Olsen for two years before separating in 2011.