'Mamma-Mia!' stars spotted kissing?

Mamma Mia! stars Dominic Cooper and Amanda Seyfried are reportedly an item.

According to ThisIsLondon, the pair were spotted kissing at London's Mahiki nightclub last night.

"They really were all over each other, sharing a Treasure Chest [cocktail]," said a witness. "They were kissing and holding hands, and being very tactile with each other.

"They were sat next to each other on a table of about 15 people, including actress Ashley Lilley, and looked very at home together."

Cooper, 29, and Seyfried, 23, remained at the venue until 3am and departed in a taxi together.