Watford have signed defender Ryan Porteous for what Hibernian say is a "significant six-figure" fee.
The 23-year-old Scotland international, who made 157 appearances for Hibs, has agreed a four-and-a-half-year deal.
His final game was last weekend's Scottish Cup home tie against Edinburgh rivals Hearts, who won 3-0.
"He's a ball-playing centre-half, he steps in, he has an element of confidence about him," boss Slaven Bilic told BBC Three Counties Radio.
"He's a young player with experience and it's a refreshment of the squad, a cosmetic change - we lost [William Troost] Ekong, who has played the most minutes of all the centre-backs since I've been here, and he [Porteous] is homegrown and a leader.