New SNL promo shows Phoebe Waller-Bridge trying to get Taylor Swift to tell a British joke

"It’s going to be mental innit, like a randy hen," said Swift, this week's musical guest, reading her cue cards. "Did you write this?" she asked the Fleabag star. “Yeah, sorry. It’s too British, isn’t it?” responded Waller-Bridge. “It’s a little bit, yeah," said Swift.

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