American rapper Snoop Dogg has had a visit from a Melbourne firefighting crew, after an alarm went off in his smoke-filled hotel room.

Snoop, whose real name is Calvin Broadus and goes variously by the names Snoop Lion, Snoopadelic and Snoopzilla, is in town to play at the Big Day Out music festival.

A spokeswoman for the Metropolitan Fire Brigade says "smoke from an unidentified source" triggered the alarm in Snoop Dogg's room.

The fire crew was attending another call-out in the five-star city hotel when they responded to the false alarm in the rapper's room.

"The guys were thrilled to meet him," the spokeswoman said.

"The duty station officer didn't know who he was at first. He later sent in a photo and his kids were thrilled."

She says no further action will be taken against Snoop.

"We've had a lot of fun with this," she said.

"It's also an opportunity to remind everyone of the importance of having a working fire alarm."

A Rastafarian since 2012, Snoop is well known for his love of marijuana.

On Thursday he posted a photo of himself online smoking, and sitting beside a large bowl of cannabis, in the Palazzo Versace hotel on the Gold Coast.

The photo has since been removed from Snoop's Instagram account.