Watford have sacked head coach Slaven Bilic after just over five months in charge of the Championship club.
The 54-year-old replaced Rob Edwards, who himself only lasted 11 games at Vicarage Road, in September.
Watford have won just one of their past eight matches and are four points outside the play-offs following Saturday's goalless draw with Preston.
The Hornets are now looking for their ninth full-time manager since Javi Gracia left in September 2019.
"We are all ambitious to succeed this season, so something new is needed quickly while the opportunity of promotion is still real," technical director Ben Manga told the club website.