Mangham was born on September 3, 2003, the son of Jesse and Kali Mangham. He attended
Wylie E. Groves High School in
Beverly Hills, Michigan, recording 25 receptions for 450 yards and eight touchdowns as a
junior. He was rated as a four-star
recruit and the 7th best prospect in the state of Michigan in the class of 2022. Mangham received 36 scholarship offers and committed to play
college football at
Michigan State University over Alabama, Michigan, Notre Dame, Penn State, Florida State, Miami and Oregon. ==College career==