Arnold Schwarzenegger Helps Matt Iseman with Proposal to Fiancée

Arnold Schwarzenegger is a man of many hats — and heading into the weekend, he put on his wings and picked up a wand to play a musical cupid for none other than Matt Iseman.

Check out this video, obtained by TMZ, showing the former Mr. Olympia doing his best conductor work Friday out in Austria … where he’s there for a mix of business and pleasure. As you can see, he was leading a band and singing a tune, with a lot of people around.

We’re told this was actually at a pre-party ahead of the Hahnenkamm Races — a major skiing event out there that they do annually … and which draws big crowds across the world.

Anyway, while Arnie was doing his thing with the band … Mr. Iseman — famous for hosting “American Ninja Warrior,” not to mention winning the “New Celebrity Apprentice” with Arnold in 2017 — was also there enjoying the fun … but then, things turned romantic with his GF.

Our sources say Matt accompanies Arnold for pretty much all his appearances — remember, he was just hosting this big auction for that troublesome watch — and he MCs those too.

That’s probably why Arnold helped him propose to criminal defense attorney Britton All … who was clearly not expecting to get engaged right then and there. Arnold was obviously in on it. Oh, BTW … John Kerry was in the mix there too — like we said, a who-who type shindig.