Chris Rock's estranged wife in the process of adopting child

Chris Rock's estranged wife is in the process of adopting the young girl who has lived with the former couple for years.

The Rush Hour star and his wife of 18 years Malaak Compton-Rock split in 2014, and they have failed to reach a divorce agreement so they are heading to trial in May, 2016.

Rock was granted joint custody of their two daughters, and it was revealed the former couple had adopted another girl from South Africa.

However, it was subsequently reported that the seven year old, who is believed to be named Ntombi, was not officially adopted, but had lived with the Rock family since 2008, when she was six months old.

Malaak has now spoken out via her lawyer to clarify the reports, insisting Ntombi is part of the family, but her adoption has yet to be finalized.

In a statement released to People.com, attorney David Aronson writes, "While the adoption by Malaak is not yet finalized, it is actively in process under the rigorous guidelines and safeguards of international adoption policy. The child is in the country lawfully with the written consent of her birth parents, and while here, has been cherished and adored by the entire Rock family."

The former couple is involved in a bitter row over support payments, insurance and division of assets.