Dee Forbes has resigned as Director General of RTE with immediate effect.
She'd been suspended last week in the wake of the controversy over undisclosed payments to Ryan Tubridy.
In a statement Dee Forbes says she 'regrets the upset and adverse publicity' suffered by RTE and its staff, and the public unease.
She's apologised unreservedly, but added the RTE Board has not treated her with anything approaching the levels of fairness, equity and respect that anyone should expect as an employee, a colleague or a person.
RTE are expected to be grilled by two Oireachtas Committees this week.
Junior Minister for the Office of Public Works Patrick O'Donovan wants to know if other presenters were also paid more than was disclosed.
"It's not a time for saying 'we'll be back to you later' - it's a time for full disclosure.
"Let's see the scale of it, whether or not this is an isolated incident, or whether it's something that is used for payment to other persons."
