Kim Kardashian had a secret room built for Kanye West's birthday present.

The couple - who married in Italy last month - have been undergoing renovations on their Bel Air mansion for over a year and the 'Keeping Up with the Kardashians' star stunned her rapper husband by unveiling a luxurious studio in the property on his 37th birthday on Sunday (08.06.14).

A source told HollywoodLife.com: ''Kim got Kanye the most incredible birthday gift which has been in the making for months. She had designers create a 'man cave' for Kanye at their new house.

''They are still in the process of making the luxurious state-of-the-art music studio and it was kept under wraps until Kim surprised him.''

And Kanye - who has 11-month-old daughter North with Kim - is thrilled with the facility.

The source added: ''Kanye was and is floored with how thoughtful and creative Kim is and is obviously over the moon.''

It was recently claimed the 33-year-old brunette beauty was considering having a tattoo tribute to her spouse.

A source said: ''Getting a tattoo is something she said she would never do, but there has been talk about getting a symbol or some initials referring to her love for Kanye inked on her lower back or somewhere discreet. It would be something delicate, simple.''