Danny Cowley has landed the man he targeted to bolster his options at the back, in the shape of the promising 22-year-old.
Carter signed a new long-term deal at Ewood Park last summer, after excelling in an impressive loan stay at Burton Albion.
Cowley said: ‘We’re delighted to bring Hayden here. He’s a young player who we know well and played a pivotal role at Burton last season.
‘He arrived in the midst of a relegation battle and they then achieved play-off form to finish in mid-table.
‘Hayden has backed that up with a number of appearances for Blackburn in the Championship and is someone who loves to defend on the front foot.
‘He’s aggressive and has a physicality about him, while he also has athleticism and pace. For such a big boy, he’s very mobile.
‘There’s also a real threat from set-pieces and that’s an area we’ve been trying to add to in terms of scoring goals.
‘So we’re really pleased to have him with us for the second half of the season and are excited to see how he can contribute.’