David Cameron welcomed the victorious British and Irish Lions rugby squad for a reception in Downing Street today.
But the Prime Minister fell victim to a "bunny ears" prank by star Manu Tuilagi as they posed for a group photo.
Mr Tuilagi later apologised for "messing around" at Downing Street on Twitter:
Apologies for messing around on Lions photo. No offence intended. Great day at Downing Street. Thanks to Prime Minister for hosting us.
Inside No 10, Mr Cameron was presented with fly-half Jonny Sexton's number 10 jersey.
He revealed that the Lions' success in Australia had inspired his own son Arthur to take up the sport:
"It's a huge honour. My son, just because of you guys, has just started tag rugby. He will be so excited about this jersey."
The Prime Minister congratulated captain Sam Warburton and coach Warren Gatland as they brought along the Tom Richards Cup to Number 10.
Cameron said: "Come tell me all about it, what it felt like to lift the cup."
Mr Warburton joked: "Heavy. I shared it so it made it a bit easier."
The Lions emerged victorious in a three-match series with Australia during the summer.
The side, comprised of players from Wales, England, Scotland and Ireland, won the first and third tests to secure a 2-1 triumph.