Amanda Holden will take over presenting duties on This Morning while Holly Willoughby is on maternity leave.
From September, Britain's Got Talent judge Amanda will join Phillip Schofield on the show's famous sofa for four days a week, while Holly takes leave to welcome her third child.
Husband-and-wife duo Eamonn Holmes and Ruth Langsford will continue to present the programme on Fridays.
Amanda Holden with Holly Willoughby in 2012
Mother-of-two Amanda, 43, has said she is ready and raring to get started on her new presenting project.
"I'm over the moon to get the chance to present one of my favourite shows on TV," she said. "I'm thrilled to be keeping Holly's seat on the sofa warm when she goes off on maternity leave.
"I have always been a huge fan of This Morning and love presenting with Phillip so I really can't wait to get started."
Really looking forward to working with lovely @Amanda_Holden again. She's standing in for @hollywills for some of her maternity leave...
— Phillip Schofield (@Schofe) July 11, 2014
This Morning host Phillip Schofield tweeted his excitement at the news
ITV Daytime's managing executive producer Emma Gormley is also excited to have Amanda on board.
"Amanda is a great talent with warmth and charisma in abundance," she said. "We are thrilled to have her join the This Morning family."
Holly Willoughby and Phillip Schofield Christine Bleakley
, who has stepped in for Holly on several occasions
, will also be on hand while the 33-year-old is away.
"Hooray! Gorgeous girls @Amanda_Holden and @clbleakley keeping the sofa warm whilst I'm away having a baby," wrote Holly on Twitter. "Enjoy the best job in telly and look after the silver fox for me xxx".
Fellow presenter Ruth also tweeted her enthusiasm about Amanda's appointment.
"@Amanda_Holden Hear we'll be sharing a dressing room at @itvthismorning from Sept!" she posted. "Feel free to borrow my toothbrush...@hollywills does! x".