Beckham, who recently unveiled his name and crest for Club Internacional de Fútbol Miami, has been praising his former team-mate.
Ibrahimovic brought up goal number 500 in sensational style on the weekend, scoring with an improvised spin and flick in LA Galaxy's 5-3 defeat to Toronto FC.
September 16, 2018
The former Sweden international has joined an illustrious group, with Cristiano Ronaldo and Lionel Messi the only active players to reach the milestone.
Beckham praised Ibrahimovic in a video shared by Zlatan's club LA Galaxy on Twitter.
"Zlatan, I want to say congratulations. 500 goals, what a career, what a player, what an achievement," said Beckham.
"A pleasure to play with you, a pleasure to play against you, a pleasure to be your friend. 500 goals, that makes you really, really old.
"But on a serious note, congratulations. One thing you need to work on is that you're a little bit shy, so work on it, you'll get better. But congratulations mate, incredible."
Zlatan replied on Twitter, saying: "My friend! Thank you very much. I agree with you, I'm old. Will work on my shy side, I definitely need to improve on that."
September 17, 2018