Amanda Seyfried revealed some subtle sideboob at the Los Angeles premiere of "Lovelace" on Monday. The actress looked sexy in a black and gold beaded halter dress sans bra. She piled her hair on top of her head and wore smoky eye makeup to complete the look.

In the film, Seyfried portrays late porn actress Linda Lovelace, who became a legendary adult film star in 1973 hardcore flick "Deep Throat."

The biopic centers on Lovelace's transformation from the daughter of religious parents to an international erotic sensation. The film hits theaters on Aug. 9.

Sharon Stone plays Seyfried's on-screen mother, and the twosome have been very chummy at the film's various premieres. Seyfried said of her co-star: "I don't know if it would have gone quite as smoothly if we hadn't started with our scenes together, because I was terrified the first day. It would have been different (if) I didn't have her maternal energy. It was amazing."

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