Megan Fox has filmed a "really hot" lesbian love scene for zombie flick Jennifer's Body.

According to a source, the Transformers actress romps topless in bed with Amanda Seyfried, who starred in Abba movie Mamma Mia.

The insiders said: "The two girls make out hardcore, rolling around in a bed. It was a really hot scene."

In the horror film, due to be released next year, Megan plays a possessed cheerleader who goes on a killing spree to get rid of her male classmates.

Scarlett Johansson recently revealed that she kissed a girl – and liked it.

The 23-year-old snogged Penelope Cruz in Woody Allen film Vicky Cristina Barcelona.

"Penelope had less facial hair than a guy, so it was certainly more pleasant," she said.

"It was better than kissing Jonathan Rhys Meyers in Match Point."

The film also sees Johansson in a menage a trois with Cruz and Javier Bardem.

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