One Direction were reportedly disappointed when they couldn't "go wild in Vegas into the early hours".

The British boy band didn't have the best time in Sin City.

Since all members are under the age of 21, no one could partake in gambling or drinking in the famous casinos.

Sneaking into the venues didn't work out for the group either.

"The boys were hoping to go wild in Vegas by boozing and gambling into the early hours," a source told UK newspaper The Sun.

"But security at every casino in town knew who the lads were and threw them out because the legal drinking and gambling age in the US is 21."

One Direction was dismayed to find that they couldn't play out one of their favourite comedy movies in real life.

"Finding out the hotel suite they had ordered wasn't the one in The Hangover was also pretty annoying," the source said.