Munster say CJ Stander did not hold talks with any other club before committing to the province until 2021.
He's signed a new three-year central contract with the IRFU. It brings to an end speculation about his future, with clubs from both France and England interested in signing the back-row.
Stander moved to Ireland in 2012 and has gone on to represent Ireland 18 times.
He has started all 10 of Ireland's 6 Nations fixtures since making his debut and scored a memorable hat-trick against Italy in the 2017 Championship.
Stander says there was no hope of having his head turned by lucrative offers from abroad:
"Following a lot of speculation and unfounded articles in the media, I am delighted to announce that I have signed a new three year contract with the IRFU through to 2021.
"My intention was always to stay with Munster and Ireland throughout this process having settled well in Limerick with my wife and within the Munster family.
"My wife and I took a leap of faith and have made a lot of sacrifices to be here but it has all been worthwhile especially given how much of a privilege it is to wear the Munster and Ireland jerseys when given that responsibility. Ireland is a special country in which to live and play rugby and I'm fully aware of that.
"The Munster and Ireland fans have been fantastic to us since we arrived and my continued focus will be to do my best for them and both teams when called upon."