Since playing Toula, Nia, 54, has starred in hit films My Life in Ruins, I Hate Valentine's Day and Larry Crowne. The mom-of-one — who is married to Ian Gomez, the actor who played Ian's Best Man in Greek Wedding — most recently appeared in an episode of Marry Me.
John, 55, is best known for playing Ian in Greek Wedding and Carrie Bradshaw's boyfriend Aidan Shaw on Sex and the City. The actor — who has been dating 10 star Bo Derek since 2002 — has also filmed TV and radio voiceovers for Applebee's Restaurants and Walgreens drug stores.
Prior to starring as Toula's Windex bottle-toting father, Michael, 89, starred as school principal Seymour Kaufman on the ABC sitcom Room 222 — for which he won an Emmy — and appeared in the short-lived 1976 sitcom Sirota's Court. He retired from acting in 2002 following his performance in Greek Wedding.
Louis, 50, is best known for his guest star roles on Friends, CSI: Miami, Charmed and The Cursed. He most recently starred in horror movies Sorority Party Massacre and 20 Feet Below: The Darkness Descending.
The 69-year-old actress has appeared in films such as Black Christmas and Hedwig and the Angry Inch and starred onstage in Broadway productions including Pippin — for which she won a Tony Award — My Favorite Year, Fiddler on the Roof and Candide.
The former 'N Sync boybander, 39, has competed on the reality show Dancing with the Stars and hosted The Singing Bee. He is now the announcer on Family Feud and host of the Food Network show Rewrapped.