According to the Scotsman, the popular television blonde gave him dancing lessons before he hit the ballroom with Katherine Heigl in "The Ugly Truth."
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"I took a few lessons because I had no idea what I was doing," Gerard told TV Guide.
Gerard explained that the two crossed paths because he used to live in the same locale as some of Julianne's co-workers.
"I knew a bunch of the guys from 'Dancing With the Stars' because I used to live in the same building as them," he said.
And apparently it was a good thing too as the Scottish actor admitted he isn't as smooth as he appears on screen.
"She did me a big favor there," he admitted.
As for Katherine, she had no problem at all with her on-screen footwork.
"This lady was just on it and she had it right away," Gerard said.