It's Always Sunny in Philadelphia ASTROLOGY, Cast, and characters, by #celebrastrology
McElhenney, Howerton, Day, Olson, and DeVito at the 2013 San Diego Comic-Con. Rob McElhenney as Ronald "Mac" McDonald – Mac Robert Dale "Rob" McElhenney Aries ( / ˈ m æ k ɨ l . h É› n i / ; [1] born April 14, 1977) Glenn Howerton as Dennis Reynolds – Dennis Glenn Franklin Howerton III Aries (born April 13, 1976) Charlie Day as Charlie Kelly – Charlie Charles Peckham " Charlie " Day Aquarius (born February 9, 1976) Kaitlin Olson as Deandra "Sweet Dee" Reynolds – Sweet Dee Kaitlin Willow Olson Leo (born August 18, 1975) Danny DeVito as Frank Reynolds (Season 2–present) – Frank Daniel Michael " Danny " DeVito, Jr. Scorpio (born November 17, 1944)