Clémence Poésy Flaunts Bump at Daniel Radcliffe's Movie Premiere

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The former Fleur Delacour is expecting!

Clémence Poésy shined on the red carpet in a tiered gold and black gown, revealing a not-so-secret growing baby bump.

The French star, 33, was attending the premiere of her former costar Daniel Radcliffe‘s upcoming film Imperium at the Deauville Film Festival in France on Friday.

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Radcliffe, 27, and Poésy reunited and were all smiles as they embraced each other at the film’s premiere. Best known for playing a Triwizard Champion in the Harry Potter series, Poésy looked thrilled to support her former costar.

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Poésy hasn’t publicly revealed who the baby’s father is. She told a friend that she is due in October, a source tells PEOPLE.

Poésy’s camp did not respond to a request for comment on her pregnancy.

Poésy currently stars in the British-French drama series The Tunnel on PBS. She most recently starred in the 2015 independent film The Ones Below.

— Blake Bakkila and Peter Mikelbank