Jeff Goldblum -- 1st Baby with Ex-Olympic Athlete ... Half His Age

62-year-old Jeff Goldblum is finally a dad ... because his 32-year-old wife (a former Olympian) just gave birth to their first kid ... on Independence Day!!!

Goldblum and his wife Emilie Livingston announced the good news on social media -- introducing their new son, Charlie Ocean Goldblum.

FYI -- Emilie was a rhythmic gymnast for Team Canada in the 2000 Olympics in Sydney ... and placed 17th in the All Around competition. Since then, she's become a professional aerialist -- performing with huge stars like Justin Bieber, Jennifer Lopez and Trey Songz.

Livingston and Goldblum married in November 2014 ... and she announced the pregnancy the day before the two tied the knot.

Congrats!