Olivia Wilde has denied speculation that she is romantically involved with Justin Timberlake.

The actress took to Twitter to respond to reports in Us Magazine that the pair "were obviously a couple or on a date" at a club recently.

The source said: "They were dancing, whispering, he had his hand on her back and shoulders and they were together all night."

However, the 'House' star spoke out against the story, tweeting: "Cool it, honeybadgers. We are just friends and have been for years."

Timberlake split from his longterm girlfriend Jessica Biel in March, and he has since been linked to 'Black Swan' actress Mila Kunis.

They star together in the forthcoming movie 'Friends With Benefits'.