Bethell has played 12 ODIs and 13 T20s for England
Jacob Bethell is set to become the youngest man to captain England in international cricket when the 21-year-old leads an understrength T20 side on a tour of Ireland in September.
With regular white-ball captain Harry Brook and England's other all-format players rested, the leadership for three T20s in Dublin has been handed to all-rounder Bethell, who has had limited playing time this summer.
Monty Bowden was 23 years and 144 days old when he led England in a Test against South Africa in 1889, and to date he remains the youngest man to have captained England in an international.
Prior to the Ireland tour, a full-strength England will play three one-day internationals and three T20s against South Africa, and Hampshire bowler Sonny Baker has been given a first call-up.
