The Hangover star Justin Bartha has walked down the aisle with his partner, personal trainer Lia Smith, on the island of O'ahu in Hawaii at Kualoa ranch.

The 35-year-old star tied the knot in an intimate ceremony, which took place on Saturday (January 4) with no more than 20 people in attendance, according to E! News.

It is believed that Reese Witherspoon and her husband Jim Toth were guests at the small ceremony.

It's further reported that the blushing bride sported a flowy, white gown, while Bartha wore a black suit.

Bartha previously dated actress and fashion designer Ashley Olsen for two years.