Brett Goldstein, who plays Roy Kent on the show, was initially just hired on as a writer. He got so attached to the character of Roy that he sent an audition tape to Bill Lawrence and later won the role.
Jason Sudeikis said his own situation paralleled Ted Lasso's, in that he was going through a bad breakup with Olivia Wilde when the show was picked up (like Lasso going through a divorce with his wife), so, like his character Ted Lasso, he went to England (where the show is filmed) in order to grieve and start moving on.
According to Hannah Waddingham, the shortbread biscuits that Ted brings Rebecca every morning were "absolutely horrific". The prop department admitted they hadn't put much effort into making them taste delicious, as they hadn't realized Waddingham would eat them with so much enthusiasm onscreen. Waddingham jokingly referred to Rebecca's enjoyment of the cookies as "the greatest acting of my life".
Jeremy Swift and Mary Roscoe, who play Leslie and Julie Higgins, are married in real life.
In real life, Cristo Fernández (Dani Rojas) played football for Tecos FC starting at age 15, but a knee injury ended his career and led him to pursue acting instead. Phil Dunster (Jamie Tartt) played rugby as a child, and tried out for London Irish RFC at 15, but was rejected, which made him realize he was too small to play professionally.