Reunited and it feels so goooood!

Tony Romo and Jerry Jones were back on the same team Wednesday night -- hanging out together at a Dallas steakhouse ... and TMZ Sports has the pic!

Here's the thing ... our Dallas sources tell us Romo and Jones arrived to Nick & Sam's separately with different parties -- but immediately noticed each other and had a friendly hello.

The best part ... it was Jerry who went to Tony's table to say hi -- and the two joked around like old friends. 

No, Jerry didn't pick up Tony's bill -- he can afford it himself with the $127 MILLION he made during his run with the Cowboys.