Peter Joseph Egan (born 28 September 1946) is a British actor known for his TV roles, including Hogarth in Big Breadwinner Hog, the future King George IV of the United Kingdom in Prince Regent (1979); smooth neighbour Paul Ryman in the sitcom Ever Decreasing Circles (1984–89); and Hugh "Shrimpie" MacClare, Marquess of Flintshire, in Downton Abbey (2012–15). He is married to retired actress Myra Frances.
Egan was born in Hampstead, London, the son of Doris (née Pick) and Michael Thomas Egan, who is of Irish descent. He was educated at St. George's Roman Catholic Comprehensive School, Maida Vale. He also attended the London Oratory School and the Royal Academy of Dramatic Art.