A clumsy riff on Shakespeare with mismatched leads, a bit of nudity – only some of it sexual — and a busload of F Bombs, “Anyone But You” is about as close as Hollywood can get to a rom-com that works these days.

Which is to say, “Not terribly close,” even though it’s not exactly terrible.

It’s a star vehicle for “Euphoria” breakout Sydney Sweeney and “Maverick” supporting player Glen Powell.

Powell gives his best. But there’s a moment when a supporting character cracks wise about Sweeney’s character being a “Miss Mumbles” which feels improvised. You instantly wonder about that line’s origins and why it made it into the picture because it smacks of an on-set irritation.

“They must have shot multiple takes of her at times,” you figure, trying to get a clear and coherent version of a line or attempting to get something droll, snappy or emotional out of her performance of it.

Flat line readings do nothing for lines that don’t sit “trippingly on the tongue” to start with.

The two “Much Ado” connections here are a testy, feuding couple whose “meet cute” has a pratfall of two in it, and a one nighter that left hard feelings on both sides, and assorted quotes from the play — “Men Were Deceivers Ever” — used as chapter headings for the attempted sex farce.

Bea and Ben (the Bard’s “Beatrice” and “Benedict”) are thrown back together when they’re in the wedding party of her sister (Hadley Robinson) and his best friend’s sister (Alexandra Shipp) in far off Sydney, Australia.

Ben has an ex Margaret (Charlee Fraser) he’d like to reconnect with, but she’s living with a hunky himbo (Joe Davidson). Bea would like to shake off her parents’ (Rachel Griffiths and Dermot Mulroney from “My Best Friend’s Wedding”) efforts to force her to make up with her own ex.

So these feuding frenemies, whose battles threaten to “f-up” the nuptials, fake a “wedding trip romance” to throw off all those people making unsubtle attempts at throwing them together.

Hilarity ensues. Rarely.

The “My Best Friend’s Wedding” connection extends beyond the Mulroney/Griffiths casting. Inexplicably, the filmmakers try to make Natasha Bedingfield’s featherweight pop confection “Unwritten” into a running gag, and a sing-along, the way “Say a Little Prayer” was in “Best Friend’s.”

That goes over like, “What, the rights to Nickelback’s ‘Photograph’ weren’t available?” Nickelback jokes always land.

Nudity is deployed for the two outrageous laughs, one of them provided by Davidson’s dopey surfer-beefcake Beau, the guy wholly aware, in the most Australian surfer dude way, of Ben’s past with Margaret.

“You had a bit of a go back when, didya? Good ON ya!”

He rattles through a collection of Aussie slang expressions for penis that’s the funniest bit in the picture. “Donger” and “tally whacker” and “the main vein” were in there somewhere.

Bryan Brown is the standout in the supporting cast, the goofy Aussie stepdad of Alexandra Shipp’s bride to be. And he’s the one who lets the “mumbles” line slip out and stick to the vivacious but colorless Sweeney like glue.

I hate to lay a film’s failure on an actor, as this script is feeble, with most of the supporting players have trouble finding a laugh either. But Sweeney is put into one plunging neckline outfit after another to keep us from noticing how drab and badly-played every line out of her mouth is.

She looks an overripe teen paired-up with Powell, and sounds, first scene to last, like an actress ill-suited for comedy.

Rating: R, sex, nudity, lots and lots of profanity, much of it gratuitous.

Cast: Sydney Sweeney, Glen Powell, Alexandra Shipp, Rachel Griffiths, Mia Artemis, Gata, Nat Buchanan, Josh Bonello, Hadley Robinson and Dermot Mulroney.

Credits: Directed by Will Gluck, scripted by Ilana Wolpert and Will Gluck. A Sony/Screen Gems release.

Running time: 1:43