James Marsden Covers Garth Brooks -- And Nails It!

KISS FM On Air with Ryan Seacrest

We know who we'd cast in a Garth Brooks biopic! 

James Marsden, star of the upcoming Nicholas Sparks book-turned-movie The Best of Me, gave an impromptu performance of Brooks' hit "Friends In Low Places," and even country stars Lady Antebellum were jealous of his singing skills.

Marsden showed up to On Air with Ryan Seacrest on Wednesday morning and the host prompted the still-hot-at-41 actor to sing a little something. "James, I just know that you have this performance bug about you that we've got to expose to the world," Seacrest instigated.

"He's stage-starved," Lady Antebellum's Charles Kelley added. "I love it!"

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Marsden admitted, "I'm really nervous."

The actor's nerves didn't seem to get in the way of him totally nailing the Garth Brooks cover and winning over the room! "Now I'm just pissed because he's better than me," joked Kelley.

At the chorus, Seacrest and Lady A. joined The Notebook actor for one memorable sing-along.

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Marsden is busy promoting The Best of Me, in theaters Oct. 17, and it just so happens that Lady Antebellum is featured on the soundtrack.

What did you think of Marsden's performance? Will this earn him some country cred?

This year has proven to be a big comeback year for Garth Brooks. ET sat down with the country legend to talk new music and new tour dates.