Kim Kardashian and Kanye West have postponed their daughter's first birthday bash.

The couple's little girl North is set to turn one on Sunday (15.06.14), but they have decided to wait until next weekend to celebrate, so the rapper can focus on work and both of their families can fly to Los Angeles for the event.

A source told E! News: ''They are throwing her a big party next weekend and Kourtney [Kardashian], Khloé Kardashian and kids coming home for it.''

Kanye, 37, is also looking forward to spending his second Father's Day with North in New York City this Sunday, after his performance at the Bonnaroo Music and Arts Festival in Nashville, Tennessee, on Friday night (13.06.14).

The couple have planned a ''low-key'' celebration to mark the occasions ahead of next weekend's lavish festivities.

The insider said: ''North was one day old last year [on Father's Day]. This weekend Kanye is performing at Bonaroo and they will fly to New York City for a low-key Father's Day and birthday party.''

The 'Keeping Up with the Kardashians' star's sisters Khloé and Kourtney, who is expecting her third child, are currently living in the Hamptons in Long Island, New York, where they are filming their upcoming E! spin-off series with Kourtney's boyfriend Scott Disick and their children, Mason, five, and Penelope, 23 months.

Meanwhile, Kim and Kanye - who are also eager to have more children soon - spent this week enjoying their ''second honeymoon'' in Mexico, after trips to Ireland and Prague following their wedding in Florence, Italy on May 24.