Ireland rugby star has signed a new two-year contract that will last until June 2017.
Trimble made his senior debut for Ulster against Cardiff in September 2005 and has gone on to represent his province 188 times, scoring 64 tries.
He won his first cap for Ireland against Australia in November 2005. The 30 year old has made 57 appearances for Ireland scoring 16 tries. His last appearance for Ireland was in the 23-17 victory over Argentina last June.
Trimble was named 2014 RWI Player of the Year after playing a starring role in the successful RBS 6 Nations Championship campaign and for his contribution in Ulster’s march to last season’s Pro12 semi-final.
IRFU Performance Director, David Nucifora said: "Andrew is a model professional who sets a great example for all young aspiring rugby players. His performances for Ireland and Ulster last season were top rate and he continues to develop his game after almost 10 years as a professional in Ireland."
Ulster Rugby Team Manager, Bryn Cunningham, said: "Andrew is a crowd favourite at Kingspan Stadium and a proven international performer, having won a multitude of awards last season. It is a huge boost to Ulster Rugby that Andrew has committed to the province for a further two years. He is an important leader within our squad and we look forward to him returning to action in the coming months."
Trimble added: "I am delighted to have signed with Ulster for a further two years. I hope to be back playing soon and will be aiming to put myself in the frame for selection for Ulster and Ireland over the coming months.
"2015 will be an exciting year at both provincial and national level and I hope to play a role in the coming years in the continuing success of Irish rugby."