Cast changes also came about, notably with the addition of Kristine Leahy ... Fans may also recognize Leahy as a co-host of NBC's "American Ninja Warrior".

Akbar Gbaja-Biamila and Kristine Leahy. Celebrities brave the course for 'American Ninja Warrior's' second annual Red Nose Day edition, including one intrepid ET reporter. 'Celebrity Ninja Warrior ...