Actor Jeremy Piven is spending St. Valentine's Day (14Feb13) by his mother's bedside as she recovers from heart surgery.

Joyce Piven, an actress and drama teacher to the stars, was admitted to a hospital this week (begs11Feb13) in preparation for the operation.

She is now resting up and the Entourage star has sacrificed the most romantic day of the year to spend time with his mum.

In a Twitter.com post on Thursday (14Feb13), he writes, "Happy Valentines (sic) day to all of you! My beautiful mom had heart surgery So (I'm) with her and wish u (sic) all love and happiness..."

Joyce and her late husband Byrne founded the Piven Theatre Workshop in Illinois, where their past students have included Hollywood stars John Cusack and his sister Joan, Desperately Seeking Susan actor Aidan Quinn and comedian Adam MCKay.