Historical clue formulations

• Muppet named after a character in "Midnight Cowboy" — 2023-04-20
• Character in "Grease" who sings "There Are Worse Things I Could Do" — 2019-09-22
• Hoffman's role in "Midnight Cowboy" — 2015-08-14
• Betty ___ ("Grease" role) — 2011-06-21