[dredmorbius]

The Graduate (1967) featured Dustin Hoffman (aged 30) playing Ben, hooking up with Anne Bancroft, mother of Ben's girlfriend.

Bancroft was 36 at the time of release.

https://en.wikipedia.org/wiki/The_Graduate

https://en.wikipedia.org/wiki/Dustin_Hoffman

https://en.wikipedia.org/wiki/Anne_Bancroft

[rasz]

In the last 20 years more and more movies started delivering appropriate casting for f->m age gaps, mainly because of pr0n revolution and popularity of MILF trope.

American Pie 1999. Jennifer Coolidge -> Eddie Thomas = 19.

Don Jon 2013. Julianne Moore -> Joseph Gordon-Levitt = 21.

Mother Lover 2009 SNL skit is a classic https://www.youtube.com/watch?v=X0DeIqJm4vM. Patricia Clarkson -> Andy Samberg = 19. Susan Sarandon -> Justin Timberlake = 35.

The French Dispatch 2021. Frances McDormand -> Timothée Chalamet = 38.

Comare that to My Tutor 1983 where 8 year difference was still seen risque.