Antonio SilvaStrikeforce officials on Tuesday made official the long-rumored bout between Antonio “Big Foot” Silva and Valentijn Overeem on Dec. 4 at the Scottrade Center in St. Louis.

The bout joins a fight card that features a headlining rematch between former Pride champion Dan Henderson and former Strikeforce champion Renato “Babalu” Sobral, as well as bouts pitting Paul Daley against Scott Smith, and Robbie Lawler against Matt Lindland.

Silva (14-2) is the former EliteXC heavyweight champion, looking to build on a win over Andrei Arlovski in his last bout, after ending a six-fight winning streak with a loss to Fabricio Werdum. Silva has long been calling for a fight against one of Strikeforce’s top heavyweights, tiring of the politics that have put heavyweight champion Alistair Overeem, Fedor Emelianenko, and Werdum out of reach.

He had a bout with Alistair Overeem offered by Japanese promoter Dream, but Strikeforce nixed the bout, according to Silva’s manager, Alex Davis. Now Silva has the opportunity to step in the cage with the champion’s brother instead.

“I want to fight and I’ll fight whoever they put in front of me,’’ Silva said. “My goal is to be the best and fight for a world title.’’

Overeem (28-23), of Amsterdam, The Netherlands, is a dangerous striker who has won his last two fights in a combined time of 47 seconds. The 6-foot-3, 34-year-old Dutchman scored a 40-second knockout (knee) over Catalin Zmarandescu last May 21. In his outing before last, the previous April 17, a head kick finished off Tengiz Tedoradze seven seconds after the opening bell.

It’s been nearly a decade for both, but Overeem counts wins over UFC Hall of Famer Randy and Sobral among victories that took place early in his career.

(UPDATED – 9:45 a.m. PT on Oct. 13 to correct a misprint of Antonio Silva’s name.)