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Scarlett Johansson urged young Americans to vote during her speech Thursday at the Democratic National Convention. But Obama was not the only guy on the actress' mind while she was in Charlotte.

"The Avengers" star was caught cuddling up to ex-boyfriend Jared Leto in a private box at the DNC.

The pair smiled and held hands while they snapped photos of themselves. When ScarJo turned in her seat, Leto playfully grabbed her ankle as she held his arm.

The stars were linked back in 2004, but rep for Johansson told ABC News that the pair has remained friends since and their DNC interaction was completely innocent.

The "We Bought a Zoo" actress is still dating her boyfriend, Nate Naylor, her rep said. The couple was spotted last month on a romantic stroll in Paris.

Stars Olivia Wilde, Jon Hamm, Zach Braff and Elizabeth Banks were also cheering on the Democrats alongside Johansson and Leto at the convention.

Photos: Celebrities Attending 2012 Political Conventions

In Johansson's speech, the actress spoke about her years growing up in a housing development for lower middle income families.

"We went to public schools and depended on programs for school transport and lunches," she said.

But the speech wasn't all serious. The actress took some time to joke about helping her mother in the polling booth when she was a little girl.

"She would take me into the polling booth and tell me which buttons to press and when to pull the level," she said.

"Is that even legal? I don't know, I don't think so," she added with a laugh.