Tadah! There's Kylie popping up to send her best wishes. An exquisitely neon-eyeshadowed Boy George delivers his personal blessing. And Jon Snow, in his trademark kaleidoscope tie, is singing – yes, singing – us the facts about same-sex marriages.

Dearly beloved, welcome to the gayest wedding of them all. And it's real.

Our Gay Wedding: The Musical screened on Channel 4 on Monday night (now on iPlayer) as a way of heralding the law change – which came into force last Saturday – declaring that homosexuals can now marry each other. And it sure did make a great big song and dance about it.

In case this whole idea sounds like some terrible episode of Don't Tell The Groom gone wrong, the fabulous quotient was provided by the couple; Benjamin Till and Nathan Taylor.

Prepare yourself for a shock (and a massive gay stereotype) but the grooms both work in showbusiness – hence the many, many celeb pals speckled about as cameos throughout. The talented pair wrote, scored and staged a sung-through marriage ceremony, bar the few bits which had to be spoken, with commentary by a kindly, avuncular Stephen Fry. Why, you may perhaps ask..? Because their long courtship revolved around nights on the town, waiting for curtain-up and feeling the butterflies before every show. Staging a musical was the natural choice for their nuptuals. And there really wasn't a dry eye in the house – in this case, a gorgeously derelict theatre in London. There were excerpts from lots of Nathan and Ben's musical mates.

Now, this was a tricky watch for me and I did it through gritted teeth, guided by the wondrous love between this pair and a big halleluah for the arrival of equality. Good luck to them. But, above all things, I'm allergic to musicals and so found the whole thing intrinsically painful. Tone deaf and wary of anything set to music, I found all the sung parts toe-curlingly irritating... but it’s their wedding, their lookout and their love story is hugely inspiring and symbolic... Just don’t bring me Our Gay Divorce, please. Over on BBC 2 on Monday night was the much quieter, more British Rev, which offered its own topical take on gay weddings. If you haven’t seen this sitcom about a former rural parish vicar trying to cope with running an inner-city church, it really is a masterclass in understated, polite comedy.

Tom Hollander plays Rev Adam Smallbone, who manages to convey all the worrysome conflict of a thoroughly decent mate to a gay couple who asks him to marry them in St Saviours. It’s against canon law, but, as his wife Alex (an ever-brilliant Olivia Colman) puts it: “it’s not properly illegal: just like parking on double yellow lines.”

Joy triumphs over the petty score of the church law, resulting in new mum Alex getting truly, gloriously smashed on whatever alcohol she can find in the holiday booze cabinet, even when an especially arch bishop pops by to investigate the sin. The show is stolen, however, by the shambolic lost soul Colin (Steve Evets) who sits next to Adam on the bench outside church for a fag.

“I just don’t understand why God hates poofs so much,” he ponders, philosophically. He recollects a gay wedding he attended, in a local car park, wasted on MDMA and ending in a fairly messy spectacle. God bless his analysis of the situation, which is too rude to repeat here. Praise the Lord for Colin and all of Adam’s lost sheep and amen to a lovely, tear-jerking gay wedding... without a musical score in sight.