Orlando and Miranda Together Again ... But Not Really

3/29/2015 7:30 AM PDT

Orlando Bloom and Miranda Kerr reunited in Malibu Saturday ... but it appears it's all about their kid.

The former hubby and wife were with 4-year-old Flynn.  They were visiting a friend in Malibu.

You'll recall there was bad blood during their divorce, especially after rumors that she got real chummy with Justin Bieber.

And who can forget Orlando taking a failed swing at the Biebs Ibiza. 

But it seems it now all about the kid, which joins them at the hip for life.