Coco!
Clink, clink, they jingle! [Obvious clunking edit, followed by 3 minutes of over orchestrated dance music played at a different volume]

Coco starring Julie Walters (in character as Mrs Overall from Acorn Antiques) - this is something that has been stuck in my mind for years, now seemed as good a time as any to let it out. Directed/produced by Merchant Ivory? In the early 90s.

Or seriously, The Most Happy Fella directed by Robert Wise immediately post The Sound of Music starring Julie Andrews as Rosabella with Carol Burnett as Cleo, Tab Hunter as the Joey, Joey, Joey dude (his name may be Joey, no way to be certain). No idea who'd be Tony, maybe Anthony Quinn?

Can we have the 1970s film of Company with Warren Beatty and all the real life Hollywood couples? Or the late 80s/early 90s Rob Reiner Into The Woods with Goldie Hawn and Cher?

- My Prince by Anna Martin (which precedes Red, White and Royal Blue by a good few years)
- Nightrunner by Lynn Flewelling (not quite the same, but I still want it.
- the Barbarian series by Amy Padilla...

- especially A Charm of Magpies and The Sin of the Cities
-the Tal Bauer series where all the world leaders are gay.
-and his various Ice Hockey/ American Football stuff
-Off the Pitch by Charlie Novak
-Howl at the Moon (lol) or Men of Lancaster County by Eli Easton...

Nepo-babies marrying other nepo-babies is probably the best route to go down. Jamie Lee Curtis and Christopher Guest's children probably, if you count Barons.