Michael Kunis, Mila Kunis' brother, weds his fiancée in a romantic Floridian ceremony but it has been his sister's relationship that has come under the most scrutiny since. The actress stood by proudly with her long-term boyfriend Ashton Kutcher at her big brother's wedding in the sun-soaked peninsula of St. Petersburg, Florida. As Michael, 36, tied the knot with Alexandra Blacker, 29, thoughts drifted to the other couple in the room and whether they might be next in line to say "I do."

Mila Kunis
Mila Kunis Attended Her Brother's Wedding, Could Another Be On The Horizon?

Mila and Ashton are said to have exchanged glances several times at meaningful intervals during the ceremony and Mila was seen yet again wearing that simple gold wedding-style band on her ring finger. The 30 year-old Ted actress looked elegant in a soft pink gown whilst Jobs actor Ashton was dapper in his dark suit with bow tie.

Michael exchanged vows with Alexandra, the dancer who trained Mila in ballet for Black Swan, at St. Petersburg's Cathedral Church of Saint Peter and the wedding party moved on to a lavish reception at the historic St. Petersburg Yacht Club.

Mila Kunis Ashton Kutcher
Mila Kunis [L] and Ashton Kutcher [R]

Mila and Ashton have been dating for some time but their fledgling relationship had always felt overshadowed by Kutcher's ongoing divorce from actress Demi Moore. Now their split has been finalised, speculation is more rife than ever regarding whether he'll move to cement his bond once again with Mila.

"Ashton and Mila have talked about getting married for quite a while," a source reportedly close to Kutcher tells PEOPLE, whilst another adds "They're incredibly happy together." It's true: whilst some celebrity couples appear as nothing more than arm candy for the other, Ashton and Mila do seem to be well-matched and are regularly pictured laughing, snuggling or on fun days out together.

Mila Kunis Oz
Will Mila Kunis Marry Ashton Kutcher?

Naturally, Ashton, 35, may be reluctant to enter into something so serious as quickly again after his rather unpleasant divorce but being at his potential future brother-in-law's wedding didn't seem to fluster him whatsoever. In fact, he and his sweetheart were noticed to be "totally in love and inseparable at the wedding."

"Every once in a while, [Mila] would look out to Ashton and make eye contact with him," E! News' source said. "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."