French actress Lea Seydoux is reportedly expecting her first child.

The Spectre actress wore a navy and black dress to the premiere for her new foreign-language movie It's Only the End of the World at the Toronto International Film Festival (TIFF) in Canada on Sunday (11Sep16) and cupped her right hand underneath a small bump while posing for photographers, sparking speculation she's with child.

She has also recently been pictured wearing a swimsuit, in which a bump can be seen, and other snaps show her boyfriend Andre Meyer cupping it as she is wrapped in a towel.

Her representatives have not confirmed reports.

The 31-year-old has been reluctant to discuss her private life in detail in interviews, rarely referring to Andre by name, but she told ES magazine in 2014 she was very happy in her relationship.

"He’s not an actor, he’s not famous at all," she said. "He writes sometimes. He’s good at philosophy. We met some time ago but neither of us was free. He has a very… pure heart."

She also told the publication she had never believed in marriage as an institution but her relationship has changed her view.

"I never believed in marriage, but now I’m in love, I think maybe," she said. "We still need to believe in things - we need discipline. I don’t believe in the religious side, but as a civil act - yes. But I don’t really care about marriage."

Lea also told the MARFA journal in March (16) she has been thinking about marriage a lot and would like to do it while she is still young. The Blue is the Warmest Colour star further revealed she was open to motherhood and said actresses who are mothers have an "interesting edge".