So, Katie Holmes really thinks she can dance.

Sources have confirmed that Mrs. Tom Cruise will appear on the season finale of So You Think You Can Dance.

"It taped last week," an insider told E! News. "It's going to be on the finale. It's a Broadway does Hollywood number. It opens on a Broadway stage and then she walks into a Hollywood studio."

Look for the season-ending episode of So You Think You Can Dance to air on August 6.

Holmes, who has been rehearsing and dancing for more than a year, did a great job. Said a source:

"She was amazing. She was such a pro. Her legs are in great shape. She's got a hat and a cane and she's wearing a leotard and tights."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.