Miles (Chris O'Dowd) says he saw "that actor from Ant-Man" meaning Paul Rudd. O'Dowd and Rudd are real life friends with the latter even making a guest appearance on Moone Boy, O'Dowd's sit-com based loosely on his own childhood.
Peter Stormare (Hafdis Snaejornsson) & Vivian Bang (Tiffany) also worked together on Kidding (2018) as Ingmar & Sun respectively.
The knife Yago pulls on Miles is a Spyderco Matriarch.