Ellen Albertini Dow Ellen Albertini Dow was a character actress who , in , appeared as Felisa Howard in the seventh season episode . She was born in Mount Carmel , Pennsylvania , USA . After Viola Stimpson , she was the second " Star Trek " actor to reach the age of 100 . Dow passed away at the age of 101 on 4 May 2015 . . Following Dow ' s death , Olaf Pooley – four months her junior – became the oldest living " Star Trek " person . Dow was also the longest - lived " Star Trek " performer , having surpassed Stimpson ' s lifespan by 88 days , until she was surpassed in 2016 by Norman Lloyd . Dow is perhaps best known for her role as Grandma Rosie in the 1998 comedy " The Wedding Singer " ( which also featured Angela Paton ) . She was also known for her role as Grandma Mary Cleary in the 2005 comedy " Wedding Crashers " , co - starring fellow " Star Trek " alumni Ron Canada , Henry Gibson , and Richard Riehle . She gained notoriety for a guest appearance on the hit television series " Seinfeld " in which she played Momma , an old woman who died yelling George ' s ( played by Jason Alexander ) PIN code : " Bosco " . Heidi Swedberg also appeared in this episode . In 1987 , she appeared in the comic horror movie " Munchies " , in which actors Robert Picardo and Wendy Schaal played a married couple . She appeared as a choir nun in the 1991 film " Sister Act " and its 1993 sequel , " Sister Act 2 : Back in the Habit " , both starring Whoopi Goldberg . Her many other film credits include " Walk Like a Man " ( 1987 ) and " Radioland Murders " ( 1994 ) , both starring Christopher Lloyd ( with the former also featuring John McLiam and the latter Corbin Bernsen and Michael McKean ) , as well as " My Blue Heaven " ( 1990 , with Ed Lauter ) , " Memoirs of an Invisible Man " ( 1992 , also with Michael McKean as well as Rosalind Chao and Aaron Lustig ) , " Patch Adams " ( 1998 , with Bob Gunton , Richard Kiley , and Harve Presnell ) , " Longshot " ( 2000 , with Paul Sorvino and The Rock ) , " Ready to Rumble " ( 2000 , with Richard Lineback ) , and " Road Trip " ( 2000 , with Andy Dick ) . Prior to her appearance on TNG , she had previously guest - starred on such television series as " Beauty and the Beast " ( starring actor Ron Perlman and also guest - starring Michael Ensign ) , " Golden Girls " , " Newhart " ( with Tony Jay and Tony Papenfuss ) , " Family Matters " , " Murphy Brown " , " The Wonder Years " ( starring Olivia d ' Abo ) , " Wings " ( starring Steven Weber ) , and the hit science fiction series " Quantum Leap " , starring future actors Scott Bakula and Dean Stockwell . She went on to appear on such shows as " ER " ( with Lily Mariye and Chase Masterson ) , " Murder One " ( with John Fleck , Clayton Rohner , Barbara Bosson , Jack Kehler , Alexander Enberg , and Jack Blessing ) , UPN ' s " G vs E " ( with Clayton Rohner , Googy Gress , and Cress Williams ) , " Will & Grace " , " Yes , Dear " , " Judging Amy " ( with Barbara Tarbuck , John Prosky , Tim Kelleher , and Mary Mara ) , " Cold Case " ( with Carolyn McCormick and Zach Grenier ) , " The John Larroquette Show " , " Nikki " ( with Nikki Cox and Brad William Henke ) , and " Six Feet Under " ( with James Cromwell and Anne Ramsay ) . She also lent her voice to episodes of Seth MacFarlane ' s " Family Guy " and " American Dad ! " ( with Patrick Stewart , Scott Grimes , and Steven Weber ) . More recently , Albertini Dow appeared in the horror thriller " The Invited " ( 2010 ) , the comedy " Not Another Not Another Movie " ( 2011 ) , an episode of " Shameless " ( 2011 , with Jerry Sroka ) , the comedy " She Wants Me " ( 2012 ) , and the thriller " Frank the Bastard " ( 2012 , with Chris Sarandon and William Sadler ) .