Actress Amanda Seyfried has stripped down to her underwear and a pair of cowboy boots for a racy new photoshoot.

The Mamma Mia! star shed her clean-cut image by playing porn queen Linda Lovelace in a movie biopic last year (13) and she has shown off her saucy side again for the spread in the April (14) issue of W magazine.

The blonde graces the cover of the publication while wearing a monochrome bustier, and she is also pictured inside reclining in a matching, rose-pattern bra and underpants and a pair of brown cowboy boots.

Seyfried tells the magazine how her role in Lovelace opened her eyes, saying, "Sex scenes are great. A lot of my co­-stars have been sexy guys my age who are really respectful and cool. So, why not? I'm not going to pretend it's not fun."