WWE Superstars ... Wedding Crashers

Forget groomsmen .... A Syracuse couple got what they were after Saturday night when 3 huge wrestlers from the WWE barreled into their wedding reception.

Roman Reigns, R-Truth and Jimmy Uso (none the groom) were at a bar in the hotel when they heard the reception and made their way in. What they didn't know -- the bride, Beth Samuels and her freshly-minted hubby Matt were huge WWE fans.

Beth knew the WWE was having a show in Syracuse so she sent an email to the wrestling org inviting any of the wrestlers who might be looking for something to do.

Turns out the 3 guys didn't have a clue about the email ... they just dropped by and stayed 45 minutes.