Ivanka Trump is joining her father's administration as an official employee, underlining her position as a key member of her father's White House team.

The first daughter announced on Wednesday she would serve as an unpaid employee in the White House, responding to ethical concerns that had been raised.

"I have heard the concerns some have with my advising the president in my personal capacity while voluntarily complying with all ethics rules and I will instead serve as an unpaid employee in the White House office, subject to all of the same rules as other federal employees," she said in a statement.

Trump previously announced she was getting a West Wing office next to senior adviser Dina Powell, who serves on the National Security Council, and would be given security clearance.