US pop star and actor Justin co-presented the gong for Best British Drama with Anna Kendrick and the pair joked about their lack of knowledge when it comes to British TV programmes.
Taking to the stage to read the nominations, Anna said: "British drama always sets the bar, so naturally they have asked two Americans to present [this award]."
Jusin then joked: "Two Americans who have never seen any of these shows!" He's joking, right?!
Anna and Justin star together in new film Trolls and posed for pictures outside London's Royal Festival Hall before the ceremony kicked off.
While Justin looked dapper in a smart tuxedo, Anna turned heads in an usual red and black dress.
The award for Best British Drama went to Wolf Hall (which Justin and Anna have no doubt not seen!).