[2] During her tenure, she co-hosted the CBS World's Fair Special and Macy's Thanksgiving Day Parade, appeared on The Mike Douglas Show and To Tell the Truth, and represented Dr. Pepper with Dick Clark.
[3][4][5][6][7][8] Mignini made her debut in the original Broadway run of Fiddler on the Roof with Adrienne Barbeau and Bette Midler, and later appeared in the show's 50th anniversary tribute at New York's Town Hall.
Additional Off-Broadway credits include The Fantasticks, I Married Wyatt Earp, Hereafter, Master Class as Maria Callas, Hard Sell, Mirandolina, Legs, and multiple productions at Ensemble Studio Theatre.
[18][19][20][21][22][23][24][25][26][27][28] Regionally, Mignini appeared in the pre-Broadway tryout of One Night Stand with Tony Curtis, Because of Winn-Dixie, Dirt, A String of Pearls, and Death of a Salesman, and served as music director of a revival of Kurt Weill's Happy End in Los Angeles.
She appeared in episodes of House of Cards, Blue Bloods, The Good Wife, Veep, Alien Nation, Mad About You, The Wonder Years, Murphy Brown, Picket Fences, Family Ties, 21 Jump Street, Fame, Newhart, and others.