Jane O'Brien Conan's sister also caught the entertainment bug, serving as a writer and producer on projects such as Cybil, The Simpsons and Battery Park, per IMDb.Unlike most of her siblings, Jane ...

Ruth Reardon O’Brien, was a partner at Ropes & Gray law firm outside Boston until her retirement in 1997. The third of six children, Conan has three brothers and two sisters. His siblings are ...

Comedian and actor Denis Leary came up around the same time as O’Brien, even appearing as a guest on Late Night with Conan O’Brien several times to promote his work. But after he got a relative a ...