Credit: Michael Bezjian/; Charles Eshelman/FilmMagic

She may not be the most seasoned dancer among the contenders, but Kate Gosselin has plenty of fans for her upcoming Dancing with the Stars stint -- including her ex-husband!

Jon Gosselin emerged on his private Twitter account Thursday night to praise his ex-wife's new venture.

"Congratulations to Kate for joining the new season of DWTS. I am thrilled for her. She has my support and vote," the reality dad, 32, wrote.

In a peacemaking mood, Gosselin added, "Here is to 2010 for new beginnings and leaving the past mistakes in 2009."

But is his good cheer genuine? In the new issue of Us Weekly, a source close to the famous father says "Jon's angry because doing Dancing with the Stars will keep [Kate] away from the kids for days, and she still won't let him have extra custody...Nannies will watch them instead of Jon."

The star's rep countered to Us, "He's happy for her. She's still part of his family and he supports her 100 percent."