The Hollywood royalty decided to look for inspiration across the pond.
Legend revealed the pair, who share two kids, stepped into the shoes of Queen Elizabeth and her husband Prince Philip... Or Prince Charles?
The Grammy winner didn't caption the snap, so fans weren't too sure if he opted to be the Queen's husband or son.
Teigen could audition for The Crown dressed in an on-brand blue coloured coat and matching hat, bag, gloves, and shoes.
John rocked a red jacket covered in military regalia.
The pair took to Instagram Stories to show off their British accents... Before making us giggle when they discovered they were too tired to actually go out.
"We were going to go somewhere, but we're so tired," Chrissy told her followers.
"We worked all day and we're so tired...So we're at home."