The May 20 event is billed as the Connecticut Republican Party's biggest event.
Walker's appearance there is just one in a long line of speaking engagements he has planned in the coming weeks outside of Wisconsin, fueling speculation that he's preparing for a run for president in 2016.
He is scheduled to be the featured speaker at the April 30 Reagan Day Dinner event in Fayetteville, Ark. On May 23, he is scheduled to headline a Republican fundraising dinner in Iowa.
On June 9 he is going to Beverly Hills, Calif., for a Republican Jewish Coalition fundraiser.
Last month he was a featured speaker at the Conservative Political Action Conference in Washington.