Singing Co-stars

[John]

Stella Stevens in "The Ballad of Cable Hogue ", (Colin, hope the nudity doesn't shock you).

https://www.youtube.com/watch?v=uLAEpF1poRw

[John]

Juliet Prowse singing the Beatles' Tomorrow Never Knows.

https://www.youtube.com/watch?v=SkpED59PkbY

There are many other clips on youtube of her singing.

[Mister Moon]

Juliet Prowse singing the Beatles' Tomorrow Never Knows.

https://www.youtube.com/watch?v=SkpED59PkbY

Far out, man.

[John]

Juliet Prowse singing the Beatles' Tomorrow Never Knows.

https://www.youtube.com/watch?v=SkpED59PkbY

Far out, man.

She was so far out, she was in.

[HillbillyCat]

Walter Matthau (King Creole) - Ok, I'm glad he didn't sing in King Creole
https://www.youtube.com/watch?v=6r8xbCc-PwQ

Francine York (Tickle Me)
https://www.youtube.com/watch?v=MTk6mzrkL74

Deborah Walley (Spinout)
https://www.youtube.com/watch?v=Vw54TcryhrI
B-Side: Sometimes In The Darkest Hour

Some "Co-Stars" who did actually record a single (or two) but no audio clip could be found yet:
Jana Lund (Loving You) recorded two songs for Liberty, back in 1957: "Johnny The Dreamer" and "Wishing Well".
https://www.45cat.com/record/f55097

Maureen Reagan (Kissin' Cousins), the daughter of US president Ronald Reagan did record two singles in 1968 ("Which Way America / Cohan Medley" & "Guess Who's Happy At Home / Never Let Freedom Die") and entertained the US troops as part of a USO show in 1969 (only silent footage can be found on YouTube)
https://www.45cat.com/artist/maureen-reagan

Barbara Werle (Tickle Me) recorded "Isn't It A Shame" and "Somebody Come And Play" for Decca in 1971.
https://www.discogs.com/release/1272300 ... e-And-Play

[HillbillyCat]

Judy Tyler (Jailhouse Rock)

"Way Back In San Francisco" / "Rovin' Gal" ("Bop Girl Goes Calypso", movie 1957)
https://www.youtube.com/watch?v=SmVTUkBK1pM