Cliftonville have signed former Glentoran forward Martin Murray and ex-Glenavon midfielder Ciaran Doherty.
Reds chairman Gerard Lawlor said the duo would add "not just further depth but additional quality to the squad".
"Both players have good Premiership experience, while Martin has also played and scored in European competition," added Lawlor.
Anthony McGonnell and Johnny McMurray have also agreed contract extensions with the Irish Premiership champions.
Murray will celebrate his 20th birthday next week while Doherty is 23.