Zac Efron Taylor Swift

Zac Efron Taylor Swift, Taylor Swift and Zac Efron are not a couple – they repeat: they’re not a couple – but just because they don’t have romantic feelings for one another doesn’t mean they didn’t put in quality time while making their animated movie, “The Lorax.”

As the two co-stars revealed on “Ellen” Tuesday, Efron has picked up a few guitar-playing skills from Grammy-winning country singer/songwriter Swift.

“I got my first guitar lesson from Taylor,” Efron told Ellen DeGeneres as Swift interjected, “he’s really good at it, from like, one lesson. I taught him how to play ‘Pumped Up Kicks’ by Foster the People.”

DeGeneres teased Swift, 22, and Efron, 24, throughout their time on her show that they acted awfully cozy – see how quickly Swift praised Efron for his burgeoning guitar skills? – but Swift swears there’s nothing going on between the two.

“We are not a couple,” Swift emphasized. “He’s awesome – we’re not a couple, though. You hear [about] people getting together when they’re shooting movies, but not animated movie co-stars.”

Zac Efron And Taylor Swift

Zac Efron And Taylor Swift, While promoting Dr. Seuss’ “The Lorax” on “The Ellen DeGeneres Show,” Taylor Swift and Zac Efron strummed their guitars and sang their version of Foster the People’s “Pumped Up Kicks.”

Swift revealed on the show that she had given Efron a guitar lesson during production of the animated film they lent their voices to.

“He had like one lesson,” Swift said. “And he was good at it! I taught him how to play ‘Pumped Up Kicks’ by Foster the People.”

The duo, who insist they are just friends, were handed guitars and played the Grammy-nominated song, though they changed the lyrics for Ellen.