Mel showed off her enviable figure on the glamorous LA photoshoot
Her honed physique and glowing reputation stateside are reportedly the reasons behind the brand's decision to hire her.
When the new appointment was leaked to The Sun earlier this month, a source from the company said: "We were blown away by the great shape she is in and desperate to land her. Mel B has never been bigger."
Mum-of-two Mel said: "I am over the moon to become the Face and Body of Ultimo lingerie. When Michelle Mone asked me, I was ecstatic. I was so excited, but slightly nervous I had never modelled lingerie before.
"The photoshoot in LA was fantastic. Ultimo lingerie gives you a superb shape and is so comfortable with sexy styles in every collection. I took every set home with me."