Miss Mousey made her debut in the 1974 special The Muppets Valentine Show, in which Kermit and Big Mouse vied for her affections during the song "Froggy Went A Courtin'." She broke both of their hearts when she instead rode off with Droop at the end of the scene.
Miss Mousey was featured as Miss Piggy's rival for Kermit's affections in episode 212 of The Muppet Show, in the number "How Could You Believe Me When I Said I Loved You When You Know I've Been a Liar All My Life". Although that was Miss Mousey's last major appearance, and the only one in which she was portrayed as a romantic interest of Kermit's, Miss Piggy claims in Jim Frawley's Camera Tests for The Muppet Movie that she broke Miss Mousey in half.
The Miss Mousey puppet, sans clothes and detailed eyes, appeared in the cast of Woodland Animals singing "For What It's Worth".
- The Muppets Valentine Show ("Froggy Went A Courtin'")
- The Muppet Show: Sex and Violence
- The Muppet Show
- Theme Song (Seasons 2 - 5)
- Episode 102: Connie Stevens
- Episode 122: Ethel Merman ("Don't Sugar Me")
- Episode 201: Don Knotts (Audience)
- Episode 204: Rich Little (Audience)
- Episode 206: Nancy Walker (Audience)
- Episode 208: Steve Martin
- Episode 210: George Burns ("It All Depends on You" / "You Made Me Love You" Medley)
- Episode 211: Dom DeLuise
- Episode 212: Bernadette Peters (""How Could You Believe Me When I Said I Loved You...", "Just One Person")
- Episode 214: Elton John (Audience)
- Episode 217: Julie Andrews ("The Lonely Goatherd", "Won't Somebody Dance with Me?")
- Episode 220: Petula Clark ("Upidee," "Tomorrow")
- Episode 221: Bob Hope ("For What It's Worth")
- Episode 223: John Cleese (At the Dance)
- Episode 306: Jean Stapleton (At the Dance)
- The Muppet Movie ("The Rainbow Connection" Finale)
- The Muppets: A Celebration of 30 Years