Cast member Tom Cruise poses at the premiere of "Tropic Thunder" at the Mann's Village theatre in Westwood, California August 11.- Xinhua/Reuters

Tom Cruise is to merge his family with Victoria and David Beckham's in a special ceremony.

The "Valkyrie" actor will hold the bizarre service - during which the families vow to be brothers and sisters and exchange heartfelt speeches - at his wife Katie Holmes' New York town house.

The gesture serves as a Thanksgiving present from Tom - who has two adopted teenage children, Isabella and Connor, with ex-wife Nicole Kidman and a two-year-old daughter, Suri, with Katie - to the showbiz couple.

A source said, "Tom and David have been friends for years and they and their families spend a lot of time together.

"This year Tom wanted to make a special gesture that would show how much he appreciates their friendship and he thought this would be the perfect way."

Tom, 46, is also building a replica of the LA Lakers' Staples Centre basketball court in the Beckhams' garden for the soccer ace and his sons Brooklyn, nine, Romeo, six, and Cruz, three.

Earlier this week, Victoria and David gave Katie a standing ovation when they joined Tom in the audience at a performance of her Broadway show "All My Sons."