Laura Prepon triggered engagement rumours after she hit the red carpet with beau Ben Foster – and a gorgeous ring on her finger.

The Orange Is The New Black star was snapped as she attended the New York premiere of The Girl On The Train.

While she didn’t say anything about her rock, US publication People says sources have confirmed it is an engagement ring.

The couple have known each other for years but are thought to have started dating in recent months.

Love is clearly in the air over at Laura’s show, as she isn’t the only star set for a trip down the aisle.

Actress Samira Wiley has just revealed that she is engaged to one of the show’s writers, Lauren Morelli.