Manager Neil Lennon has paid tribute to Jozo Simunovic and Jonny Hayes after Celtic confirmed the pair’s departure.
The Scottish champions have opted not to take the option of a further year on Simunovic’s contract, while Hayes’ deal expires on Sunday.
Croatian centre-back Simunovic, 25, played 125 games in his five-year spell and Republic of Ireland winger Hayes made 68 appearances in three seasons.
“Both leave Celtic as nine-in-a-row champions,” said Lennon.
“It’s an achievement they richly deserve and something I know they will cherish dearly.
“I would like to sincerely thank both Jozo and Jonny, brilliant lads who have given their all to Celtic over a number of years.”
Hayes posted a farewell message on Instagram reflecting on his “enjoyable journey” at Celtic Park.
“Football at times brings tough decisions,” Hayes wrote.
“[From] breaking a leg to the highs of winning a treble, the last three years have been an enjoyable journey, in which I’ve worked under some terrific staff and shared a dressing room with some unbelievable guys.”