Ian Cathro is the new head coach at Hearts after agreeing to leave his post at Newcastle.
The 30-year-old has signed a three-and-a-half-year deal at Tynecastle and will take charge of Saturday's Scottish Premiership match at Rangers.
He replaces Robbie Neilson, who left last week to take over at MK Dons, along with assistant Stevie Crawford.
Cathro had been an assistant coach at St James' Park since June 2015, serving Steve McClaren and then Rafa Benitez.
"We are delighted to have secured the services of Ian Cathro and are confident he is the ideal candidate to take our club forward," said chairwoman Ann Budge.