Full membership of the group is to be finalised "in the coming days"
Moninne Griffith has been announced as chair of a review group of the Gender Recognition Act 2015.
Ms Griffith is executive director of BeLonG To, a national organisation for lesbian, gay, bisexual and transgender (LGBT) young people.
The review of the act will cover issues such as gender recognition for children younger than 16 years, arrangements for 16 and 17-year-olds and the position of non-binary and intersex persons.
Employment Affairs and Social Protection Minister Regina Doherty also announced three members of the group: Sara Phillips, Seamus Byrne and Dr Tanya Ní Mhuirthile.
The department says full membership of the group will be finalised "in the coming days."
It will include representatives of key stakeholder groups and Government departments.
Young transgender and non-binary people are also being consulted for their views on the act.
It is to begin its work later this month.
While the 2015 act was regarded as historic in that it allows trans people to get legal recognition of their gender, it only applies to those over 18.
Minister Doherty said: "Moninne Griffith's professional background and her current work make her an ideal person to chair the Gender Recognition Act Review Group.
"I am grateful to her for agreeing to chair the group."
Ms Griffith added: "I was honoured to be offered the role of chair of the Review Group.
"I look forward to working with the many individuals and groups who have views and a vision of what the 2015 Act can deliver."
It is hoped the review will be completed by end of May 2018.
Additional reporting: Juliette Gash