Jodi Benson as Ariel
Benson's gone on to do iconic voiceover work. She voiced Tula in The Pirates of Dark Water, Thumbelina in Thumbelina, Weebo in Flubber, and Barbie in Toy Story 3. She also appeared in 2007's Enchanted.
Pat Carroll as Ursula
Carroll also voiced Morgana, Ursula's sister, in The Little Mermaid 2: Return to the Sea, and has continued to do voiceover and TV work.
Christopher Daniel Barnes as Prince Eric
Barnes went on to play Greg Brady in The Brady Bunch Movie and A Very Brady Sequel, and Lenny in Beverly Hills, 90210.
Samuel E. Wright as Sebastian
Wright's reprised his role of Sebastian many times, and has also appeared on Law & Order.
Kenneth Mars as Triton
Mars went on to do a ton of voiceover and TV work, and passed away in 2011.
Jason Marin as Flounder
Marin's first role was Sherman Peabody in Back to the Future (pictured above), and his last known role was in Beverly Hills, 90210 in 1993.
Buddy Hackett as Scuttle
Hackett later took on roles in Boy Meets World, Sabrina the Teenage Witch, and All That. He passed away in 2003.
Rene Auberjonois as Chef Louis
Auberjonois has appeared in many TV shows (Star Trek: Enterprise, It's Always Sunny in Philadelphia, and The Librarians to name a few), as well as the films Batman Forever and The Patriot.