The 49-year-old actor had thrown his back out on a party bus the night before his wedding.
Josh Duhamel's rehearsal dinner antics almost proved to be a real problem on his wedding day. The 49-year-old actor tied the knot with Audra Mari in North Dakota earlier this month, but came very close to not making it down the aisle.
The actor spoke with ET's Cassie DiLaura recently -- while promoting his upcoming film Bandit, which hits theaters Sept. 23 -- and he opened up about how he threw his back out hours before he was set to walk down the aisle.
"That was a close call. I woke up the morning of the wedding and I could not get out of bed," he explained. "An hour before the wedding, I went straight from the emergency room to the church to get my suit put on."
When asked how he sustained the injury, Duhamel joked, "Because I'm an idiot!"
According to the actor, he was celebrating on a party bus they'd hired to drive them around after the rehearsal dinner. At one point, he tried to lift himself up by two poles on the bus "like some kind of gymnast," and that proved to be a big mistake.
The actor also made an appearance on The Late Late Show With James Corden on Tuesday, and recalled his close call right before exchanging vows.
"So I think I'm going to hang from the rafters inside this party bus and start crowd surfing atop it, and I throw my back out," Duhamel shared. "I thought I was fine, I wake up the next morning and I literally can't get up out of bed."
Noting that the situation was "touch and go" right up until he walked down the aisle, the Shotgun Wedding star revealed he had to make a trip to the emergency room for a steroid shot.
"The one day you have to be able to walk is down that aisle," he explained. "It was touch and go right up until an hour before the wedding. I went to the emergency room, got shot up, and I was fine the whole night and then I woke up the next morning and I couldn't get out of bed."
It seems that the party bus debacle didn't stop Duhamel and his new bride from hitting the town on their wedding day. They were spotted at the local bar, Duffy's Tavern, in their full wedding attire after tying the knot.
An eyewitness told ET, "Josh Duhamel stopped in to Duffy's Tavern in Fargo, North Dakota, with Audra Mari and a party bus of people at around 4:30 p.m. Someone called the bar ahead of their arrival saying there was a party bus coming with 30 people and they would like 30 shots of Don Julio Blanco tequila."