Bonnie Somerville as Mona – Then
Mona was Ross’s girlfriend during the 8th season of the show. They hit it off pretty instantly and it was adorable to watch Ross try to impress her at Chandler and Monica’s wedding. They start dating shortly after Ross finds out that Rachel is pregnant with their baby. She finds out about the pregnancy when Rachel’s father comes over to Ross’ place during their date. Ouch!
He gives her the keys to his apartment and then changes the lock. He then asks Rachel to move in with him but again, doesn’t mention it to Mona. When she finds out about it on Valentine’s Day, she gets understandably upset and breaks up with him. She deserved better…