RTE rugby pundit George Hook has said he has been "really impressed by the sincerity" of Conor Cusack's personal account of his battle with depression.
Hook, who has been forthcoming in the past about his own experience of the illness, said he wanted people to understand it's okay to talk.
"We who talk about it have to talk about it in a very heartfelt way because it is so personal. It strikes through the very heart of who we are.
"It's very important those who suffer sense they are not alone. If they sense they are not alone, that there are others in the same boat, it makes it an awful lot easier for them.
"I want people to understand it's okay to talk about it."
Hook was speaking at the launch of his book 'This is Rugby' last night at the Westbury Hotel in Dublin.
"This book has been in my head for a long time," he said. He said it was about the "best and the greatest, the best teams and the best players.
"When I wrote it in my head I imagined myself sitting on a bar stool with three other people around me and we're arguing vociferously about who are the best players."
It was launched by Irish rugby legend Dr Jack Kyle, who Hook described as the greatest player of all time. Pat Kenny also attended.
Meanwhile, he said he would be bowing out of his role on the RTE panel after the 2015 World Cup.