The parents of Co Leitrim teenager Meadhbh McGivern, who had a liver transplant in London yesterday, say they have received a phone call of support from President Mary McAleese.
President McAleese called this morning to wish them well and to ask about Meadhbh's condition.
Joe and Assumpta McGivern have also thanked the people of Ballinamore and well-wishers from across the country for all the messages they have received.
Meadhbh McGivern is in intensive care, sedated and on a ventilator at King's College Hospital in London following 13 hours of transplant surgery yesterday.
Her parents are at her beside and say they are relieved she now has a healthy liver.
However Joe McGivern told RTÉ News that, while the operation was just the first hurdle, "there was a bit of road to go yet".
Speaking on RTÉ's Morning Ireland, Mr McGivern said the surgical team at King's College Hospital were happy with how the procedure had gone, but he admitted to being nervous about the operation.
The operation came two months after Meadhbh missed out on a transplant because of a breakdown in communications, which meant she did not get to an air ambulance.