Bronny James and Parker Whitfield are celebrating yet another milestone this summer -- it's her 21st birthday ... and the Los Angeles Lakers player gave his girlfriend a sweet shoutout to mark the special day.
Whitfield -- the daughter of actor Dondre Whitfield and actress Salli Richardson -- made her 21st trip around the sun on Tuesday ... and shared several shoutouts from her friends on her Instagram story.
Of course, the most notable post was from Bronny .