A beaming Jeremy Piven spoke to ET backstage at the Emmy Awards moments after he won the Best Supporting Comedy Actor award for his role playing Ari Gold on HBO's "Entourage."

Watch Jeremy continue his acceptance speech to our cameras, in which he explains that he forgot to thank the cast and crew of "Entourage" while on the Emmy stage. He also tells ET about his silent, heartfelt thank you to his father!

Sunday's award is Jeremy's third Emmy win in the same category for the series.