Nas and Kelis to divorce

Hip-hop supercouple Nas and Kelis are to divorce just months before the birth of their first child together.

Kelis has filed papers via top divorce lawyer Laura Wasser, citing "irreconcilable differences" and a spokesperson for the singer told Vibe.com: "I can confirm that she has filed for divorce. We request the media to respect her privacy during this very difficult time."

The 'Milkshake' hitmaker is expecting the now-estranged couple's son at the end of the summer.

Kelis is asking for spousal and child support and is also seeking joint legal and physical custody of the unborn child, reported TMZ.com.

Nas has a teenage daughter from a previous relationship.

The couple met at an MTV Video Music Awards afterparty in 2002 and they wed in Atlanta, Georgia in July, 2003.