Ismaila Sarr scored the only goal that fired William Troost-Ekong's Watford back to the Premier League after a 1-0 victory over Millwall.
The Senegal winger won a penalty for Xisco Munoz's side in the opening minutes of Saturday’s Championship encounter after he was brought down, and he immediately stepped forward to break the deadlock at Vicarage Road in the 11th minute.
The goal separated both teams for the entire 90 minutes and sealed Watford's promotion to the Premier League in second spot.
Editors' Picks
The Hornets have gathered 88 points from 44 matches so far - five points behind leaders Norwich City with two matches remaining and 10 points behind third-placed Brentford.