An insider told Entertainment Tonight that the fight looked to be staged, adding to the theory that the entire wedding was a publicity stunt.
Regardless, the fight didn't last long and was broken up by security in just a few minutes.
The culprit was also removed from the wedding, allowing Jake and Tana to finally share their first kiss as husband and wife.
The 21-year-old bride made light of the dramatic moment in a tweet, writing:
"Someone just threw a glass of champagne at Jake and I at the f**king altar holy f**k HAAHAHAHAHAHA. Jana don’t need no press, Wow. Just married. Honestly made it better.... to slow dance while they scream. I love you @jakepaul."
In another controversial moment, Logan told a reporter that he didn't think the relationship between his brother and Tana would last.
"Do you think that they're gonna last?" asked the reporter.
"No," Logan immediately responded.
When the reporter asked why not, he answered, "Seems a bit hasty in my opinion, seems a bit preemptive one may say."
"How long would you give them?" the reporter pushed.
"One month."
WATCH: Logan Paul tells reporters that he doesn't think Jake Paul and Tana Mongeau will last
The wedding banquet included candy from the Sugar Factory, along with a "no regrets" bar.
Somehow the Oprah Winfrey impersonator was the least peculiar part, with Jake using a sword to cut their wedding cake (resulting in it splattering everywhere).
A spray paint artist reportedly created murals of the newlyweds during the event, as the YouTubers partied until their wedding was unsurprisingly shut down.
Despite the controversy, the couple appeared to enjoy the entire experience and as expected, delivered plenty of entertainment to their subscribers.