The TV presenter and single mother of three has take a week off.
Walker will make his debut broadcast on Channel 5 later today.
The broadcaster interviewed the prime minister earlier this month.
The prime minister reportedly told aides he got 'beaten up' by Susanna Reid
The Prime Minister asked 'Who's Lorraine?' as her show was introduced following his interview on 'Good Morning Britain'.
The broadcaster begins his new TalkTV show on Monday.
Piers Morgan has said that he may storm the set of Good Morning Britain when he makes a return to ITV studios to chat with Lorraine Kelly
The Harry Potter star declined to join the discourse on the infamous Oscar slap.
Reid says Morgan received worse troll comments than she did while they worked together.
The presenter shared her thoughts in a post on Twitter.
Normal service resumed in the world of showbiz, with red carpets given the greenlight and reality shows back on the telly.
Susanna Reid was throwing her support behind a new knife crime campaign launched by Crystal Palace FC.
The 'I'm A Celeb' star had to leave camp after falling ill.
The Queen guitarist was asked about the carbon footprint of his home heating arrangements.
The rugby star seemed to let the cat out of the bag on 'Good Morning Britain'.
'Good Morning Britain' presenter Richard Madeley has all but confirmed that he will be taking part in this year's 'I'm A Celebrity... Get Me Out Of Here'.
Ofcom cleared Piers Morgan over on-air comments he made about Meghan Markle.
Kevin Lygo answered questions about the future of ITV at Edinburgh TV Fest, including discussions on Piers Morgan's replacement.
The money expert went with his usual open-collared look to present the breakfast news.
The star said he has been followed in shops because of the colour of his skin.
Bill Bailey admitted that he previously submitted a song for Eurovision but it was rejected by the BBC for being 'too silly'.
The former 'BBC Breakfast' co-hosts are briefly back together.
Who became a mother in her 50s, who quit Strictly and who was upset with Little Mix? If you think you know - prove it!
Reid described Turnbull as a 'beloved favourite of breakfast television' as she prepared to work with him again.
The former Labour spin doctor is a guest presenter on the ITV show.