Wrestling fans in Puerto Rico got one helluva show Sunday night ... when suspended WWE superstar Paige climbed in the ring ... and POPPED THE QUESTION to Alberto Del Rio!
ADR was facing off against Carlito at a WWC event -- when his longtime GF got past the ropes and dropped down to one knee.
FYI, Alberto is still reportedly married ... though he's currently going through divorce proceedings with his estranged wife, Angela, in Mexico.
As for Paige, she talked about the proposal after the match -- saying the two are a wrestling couple so "the cheesier the better."
Waiting for your permission to load the Facebook Video.