Continuity mistake: At the start of the plane scene to New Orleans, Merritt says "Allow me to make plain what we've both been thinking." At this moment, Merritt is resting on a pillow with a T sign stitched onto it. Merritt is first shown to be resting on the T, but a couple of shots later, Merritt is suddenly on the other end of the pillow.(00:39:55)
Continuity mistake: When congratulating Tressler at the show, Daniel asks Tressler to stay standing. Tressler has his hands by his side. The shot cuts to Daniel, Merritt and Henley on the stage, and Tressler is seen on the TV in the background, where his hands are now clasped together.(00:18:05)
Continuity mistake: When Thaddeus is first introduced, he is in the audience recording the Horsemen's Las Vegas show on his phone. In the shot where the camera pans from the stage over to Thaddeus in his seat, there is a man sitting next to him applauding with the crowd and there is a watch on the man's wrist. A couple of shots later, when Thaddeus tells the usher he is going to put his phone away, the watch has vanished.(00:16:00)
Continuity mistake: When Daniel, Merritt and Henley first meet outside apartment 6A, the golden adjusting buckle on Daniel's bag strap is on the top of his shoulder and there are two plastic adjusting buckles on the front side of the strap, one near the top and a second further down. A few seconds later, after Merritt says the door is locked, the shot cuts to Daniel saying "Is it?" and the two plastic buckles are now further up the strap. Also, the shot cuts to angle behind Daniel and the golden buckle on the strap is now on the back side. As Daniel walks back to Merritt and Henley after trying to open the door, the golden buckle is now on the front side of the strap and much closer to one of the plastic buckles. The shot cuts again and the top plastic buckle is suddenly by his shoulder, and the golden buckle is suddenly back on the back side of the strap. Later on, when Jack arrives in the scene, the golden buckle is suddenly back on his shoulder again.(00:10:05)
Continuity mistake: When Henley is being cheered at by the crowd after finishing her trick, she gives a member of the crowd a fist bump, but in the next shot, she has her hand placed over the man's fist.(00:07:20)
Continuity mistake: In the end credits scene, when Eggsy appears in the pub, Dean is holding a pint glass in his hand, but in the next shot, the glass is suddenly on the table.
Continuity mistake: When Rick and Kirsten are at the game, just after they shout at one of the players, Kirsten drinks from her cup, but in the next shot, the cup is suddenly back in the armrest holster.(00:33:40)
Continuity mistake: When Nadine and Erwin are playing golf, Erwin is standing right next to the hole when he kicks his ball into it, but in the next shot, he is suddenly standing a couple feet away from it.(00:35:30)
Continuity mistake: When Dex stomps on the milk carton at his wedding, the rabbi is wearing a dark blue/grey outfit, but in the next shot is wearing a much lighter blue outfit.(01:21:35)
Continuity mistake: When Dex and Sunshine get married, Dex stomps on a milk carton which sprays milk across the stage, but in the next shot, the milk has disappeared.(01:21:35)
Continuity mistake: When Dex proposes to Sunshine, he takes out the ring in his left hand, but when Sunshine says yes, the ring has disappeared.(01:21:25)
Continuity mistake: When Sunshine punches Lady X back to ugly, there is no one in the background behind her except for Mr. Clipboard, but when she stands up, three people have suddenly appeared, and Mr. Clipboard has disappeared.(01:20:00)
Continuity mistake: When Lady X begins beating up Dex, Dan says to sugar smack upside her prune head, and a muscular man is seen in the background standing next to Mr. Clean. This man disappears two shots later.(01:19:10)
Continuity mistake: When Dex walks up to Mr. Clipboard, he is standing with yellow lines on the road to his far right, but in the next shot, he is standing directly on the yellow lines.(01:17:20)
Continuity mistake: When Dex is about to confront Mr. Clipboard and Sunshine tells him he can't, the road markings behind her change every time the shot cuts to her.(01:16:50)
Revealing mistake: When Dex and Sunshine are reunited, the two are face to face, but her eyes do not line with where Dex's eyes or face are located.(01:14:45)
Continuity mistake: When Sunshine is about to be killed by the general, she has her hands tied to the chair. She then manages to untie her hands to throw Dex a raisin, but after the general has been killed, Dex then unties her hands again.(01:14:10)
Continuity mistake: When Lady X leaves so the general can kill Dex and Sunshine, Dex pulls on the rug to make the general fall, leaving it pulled and dragged, but in the next shot, the rug is back to its original position.(01:14:05)
Continuity mistake: When Maximillius and the frog are talking about Benjamin Franklin outside the Copa-Banana, the frog's shadow is behind him in one shot, but in front of him in the next.(01:12:40)