Simu Liu got in touch with Taylor Swift to help with his proposal to Allison Hsu

Appearing on The Tonight Show, he told Jimmy Fallon: "My fiancée works in music, she's a digital marketing ex ecutive, and she grew up a Swiftie.

"She loves Taylor Swift. Taylor Swift's songs and her music, that was a big part even in the beginning of our relationship, was getting to know [my fiancée] through those songs and why they meant so much to her.

"So I was like, well, if there's one person that would make this engagement so special, and I reached out, as if we're BFFs.

"No, I mean, I met her a couple times, she's fantastic, but I reached out to Taylor through her publicist, and I said, 'Hey, is there any way that I could convince you to make a two second video just to say congrats?' "

Simu was delighted when, just a couple of days later, the Anti-Hero hitmaker came through with the "cherry on top" of his proposal.

He added: "She literally, two days later, sent it over and I was able to play it for her, and so, Taylor Swift was the cherry on top!

"She is just so nice and sweet."

Simu - who is best known for playing Shang-Chi in the Marvel Cinematic Universe - revealed Allison "completely lost it" when she saw the congratulatory video.

He said: "She was really emotional before, but when I played that video, she just completely lost it. She went into shock."

Simu revealed their engagement in May this year, as he shared photos of them in front of the Eiffel Tower, and his partner's ring.

He wrote: "Us forever [ring and heart emojis]"

He added in a separate post: "From weekends in Paris, day trips to Palm Springs, long nights on set, afternoons vegging on the couch and everything in between, I choose you forever and always."