I have no connection with Alex Guinness or Peter Mayhew
According to WikiTree I'm 30 degrees from Carrie Fisher.
According to GeniCom she is my 21st cousin four times removed, the connection there goes through Jan I, Duke of Brabant and Limburg, Carrie's ancestor would be a descendant of his sister Marie Capet, Queen consort of France. (see the ancestors of Winifred Dyer, mother of Agnes A. Jennings)
My origins from the Dukes of Brabant have been validated, I have no idea about the origins of Carrie Fisher, so beware.....check the data on GeniCom before you copy it !!