Donald Trump's daughter Ivanka has taken an unpaid job officially advising her father at the White House.
The First Daughter, as she was nicknamed, had come under increasing pressure to formalise her role due to the amount of time she was already spending working with her father.
Her husband Jared Kushner is already an unpaid but official senior adviser to the US President.
In a statement Ms Trump said she would be subject to all the rules as other federal employees.
She said: "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."
It is not clear what impact, if any, her new role will have on her self-titled clothing business.
Her father agreed, as past presidents had done, to put his business interests into a trust for the period while he is commander-in-chief, but the arrangement is not a blind trust as many had called for.
Questions about possible conflicts of interest that could arise as a result of Ivanka Trump's work followed an announcement on 20 March the 35-year-old would become an informal adviser to her father, with an office in the West Wing.
Ethics experts said it would allow her to avoid some of the rules and disclosures that other federal employees were subject to.
There were already concerns she was attending a number of top level meetings with her father despite not being an official part of the White House staff.
A spokesman for the President said: "We are pleased that Ivanka Trump has chosen to take this step in her unprecedented role as first daughter and in support of the president.
"Ivanka's service as an unpaid employee furthers our commitment to ethics, transparency, and compliance and affords her increased opportunities to lead initiatives driving real policy benefits for the American public that would not have been available to her previously."
In taking the official role she sidesteps further criticism at a time when her father's ratings are at an all-time low, following a series of policy difficulties.
His average rating, according to RealClear Politics, has fallen to -11.5, with 52.9% of those polled disapproving of his actions, to 41.4% approving.