The 16-year-old was among the thousands of teenagers across the country finding out their grades on Thursday morning, when marks reached a record high.
Proud mum Victoria, 47, congratulated Cruz in a post on her Instagram Story.
Sharing a snap of the teen swimming in the sea, the Spice Girl-turned-designer wrote: “Well done @cruzbeckham on your amazing school results!
"We are all so proud of you!!”
Former footballer David posted a sweet photo showing him and Cruz sharing a hug.
“Congrats Cruzie so proud - well done big boy,” he wrote.
The stars didn’t share what Cruz was planning to do next but the youngster has previously indicated that he’d like to follow in the footsteps of his Spice Girl mum and have a career in music.
He has previously shared photos on Instagram showing him playing instruments, and when a fan once asked what his biggest dream was, Cruz replied: “To make music everybody loves and for music to last forever!”
Victoria and David have four children together.
The couple also share sons Brooklyn, 22, and Romeo, 18, and 10-year-old daughter Harper Seven.
Watch: Tom Cruise and David Beckham's friendship explained