The pair continued the prank to help sick children.
The two frenemies have an ongoing history of calling each other out publicly.
See the leading man's hilarious video!
The pair's fake feud is back after they tried to bury the hatchet earlier this year.
'Activate: The Global Citizen Movement' aims to raise awareness about extreme poverty, inequality and sustainability issues.
Following news that the Nobel Prize winner died on Monday, Winfrey took to Instagram to remember her late friend.
The actress and singer revealed on Sunday that she's living with cancer and doesn't want to know how long she has left in life.
ET catches up with Pamela Hayden, Nancy Cartwright, Stephanie Gillis and Mike Scully to discuss the show's many guest stars.
Take a look at the actors' 'ads' for each other's brands.
Hugh Jackman and Zach Galifianakis bring the story to the big screen, April 12, 2019.
Pierce Brosnan, Hugh Jackman and the 33-year-old actress all happened to be at the Geneva airport!
ET spoke with Jackman as he gears up for his first world tour, 'The Man. The Music. The Show..'
Jackman called the tour, which is aptly titled 'The Man. The Music. The Show.,' 'a dream come true.'
The actor, singer and dancer's taking his talents on the road in a world tour, featuring songs from 'The Greatest Showman.'
