Mila Kunis Takes Ashton Kutcher to Her Brother's Wedding

The 'Oz: The Great and Powerful' star and her boyfriend attend Michael Kunis' wedding which is held at the Cathedral Church of Saint Peter in St. Petersburg, Fla.

Ashton Kutcher joined Mila Kunis at her brother's wedding on Saturday, December 7 in St. Petersburg, Fla. Michael Kunis married his ballet dancer girlfriend Alexandra Blacker in a ceremony which was held at the Cathedral Church of Saint Peter. Alexandra trained Mila for her role in 2010's "Black Swan". She was engaged to Mila's brother in December 2012.

The actress wore a soft pink, knee-length dress during the ceremony and reportedly still wore the gold band on her ring finger. "Mila wore a gold band on her engagement ring finger but it didn't have a diamond, just a simple gold band similar to a wedding band. Mila was very happy for her brother and his wife. During the ceremony, she stood at the altar and seemed very focused on the vows," a source told E! News.

"Every once in a while, [Mila] would look out to Ashton and make eye contact with him. Ashton was very supportive of Mila and happy for the family. He was joking around with Mila's brother and they invited him to come and pose for family pictures with the bride and groom after the wedding," the source added. Mila and Ashton looked "totally in love and inseparable at the wedding."

"They rarely left each other's sides and were always holding hands and whispering to one another. Ashton let Mila do her thing but always was right there at her side. If she was busy, he knew lots of people to talk to and was having a great time with her parents and friends," the eyewitness continued, adding that it was "a great day for everyone."

Another source, meanwhile, told PEOPLE that Mila and the "Two and a Half Men" star presented the newly-married couple with a 10-day trip to Australia. The couple's wedding reception was held at the historic St. Petersburg Yacht Club.