Dixon to guest present ITV slot
"I love watching Lorraine in the morning so it's really exciting to be asked to guest present," she said.
Alesha, who won BBC's Strictly Come Dancing in 2007, will show off her culinary skills with chef James Tanner, share the latest fashion trends and find out the news from Hollywood from Los Angeles correspondent Ross King.
She added: "The show's going to be jam-packed this week with food features, all the latest trends and fashions and of course showbiz - I might even be able to reveal some Britain's Got Talent gossip!"
Alesha is no stranger to presenting, having previously co-hosted the Mobo Awards in 2010 and 2011, ITV2's coverage of The Brit Awards in 2009 and red-carpet coverage of the 62nd British Academy Film Awards in 2009 for E!.
She also presented a street-dance competition for CBBC, called Alesha's Street Dance Stars, which is now in its third series.