Fearne, who is the mother to one-year-old son Rex, will help to encourage the public to nominate the most deservings mums of the year.
In its tenth year, the Tesco Mum of the Year awards celebrate the important things that mums across the country do - whether that means getting involved in a local charity or the helping out within the community.
She added: "I am very excited to be part of the 10th year anniversary for the Awards and to help give these incredible mums the recognition and appreciation they deserve."
Fearne became a mother for the first time in February 2013.
"Jesse and I are over the moon to announce the arrival of Rex Rayne Wood born on the 21.2.13. Beyond in love," she wrote on Twitter.
Fearne and Jesse, son of Rolling Stones rocker Ronnie, met in 2011 when the DJ, 32, was supposedly on a girl's getaway in Ibiza with a group of friends including Denise van Outen.
They quickly became inseparable and tied the knot in July 2014.
The darling of BBC radio couldn't be any more thrilled with the idea of becoming Mrs Wood, telling Red magazine:"I can't wait to be a wife. It just feels really solid. I want to have the same surname. I want to feel like we've done it properly."
The closing date for nominations is 5 September.