Are Calvin Harris and Nicole Scherzinger hooking up?

Calvin Harris and Nicole Scherzinger Dating?
Calvin Harris and Nicole Scherzinger Dating?

Is Calvin Harris rebounding from Taylor Swift with fellow pop star Nicole Scherzinger?

Despite the rumors, sources told E! News that the pair are strictly friends. Harris and Scherzinger were photographed arm-in-arm leaving a London nightclub over the weekend, prompting speculation that they're romantically involved.

SEE ALSO: David Foster's ex Yolanda Hadid performed as a sexy stewardess for his wedding present: Watch

The photos, which you can see in the video above, were released amid worldwide hysteria over Harris' ex, Taylor Swift, who has quickly moved on from their relationship with actor Tom Hiddleston. The couple has been photographed on three different continents in less than a month.

As for Harris and Scherzinger, the source described them as "casual friends."

See photos of Calvin Harris and Taylor Swift together:

This content is not available due to your privacy preferences.
Update your settings here to see it.

"If they see each other at a club or a party, they will chill," the source continued. "They are not hooking up or hanging out."

Additionally, the rumors are further negated by the fact that the pop singer is allegedly still completely off the market -- she's still tied to tennis star Grigor Dimitrov. Dimitrov previously dated Maria Sharapova.

RELATED: Inside Hiddleswift's epic Fourth of July weekend:

Inside Hiddleswift's 4th of July Weekend
Inside Hiddleswift's 4th of July Weekend

More from AOL.com:
Elle Fanning debuts new rose pink hair: See the transformation
Logo greenlights first gay reality dating show, Lance Bass to host
Ashley Madison's first-ever TV commercials are so dark