Emma Roberts and Zac Efron were spotted "all over each other" at a recent party.

Emma has been dating Chord Overstreet since they met at the US Coachella music festival in April, although they have remained tight-lipped about their romance.

However, Emma reportedly enjoyed a night out with Hollywood Hunk Zac recently. According to reports, the pair were seen "full-on making out".

Emma, 20, and Zac, 24, were at an after-hours party hosted by Lance Bass at the end of October when they were spotted in the amorous clinch.

"Zac and Emma both wound up at Lance's party, and before the night was over, they were all over each other," a witness told In Touch.

"They took each other's numbers and seemed into each other."

Emma has previously romanced actor Alex Pettyfer, while Zac is famed for his high-profile relationship with High School Musical co-star Vanessa Hudgens.