Pre-season The first signings for this season were free transfers of Nigerian international winger
Peter Olayinka on 9 January On 13 June Serbian defender
Radovan Pankov left the club after four seasons. He joined Polish powerhouse
Legia Warsaw on a 3-year contract. On 16 June two more players left the club. Serbian midfielder and product of club's youth academy
Veljko Nikolić left the club to join Cypriot champions
Aris Limassol. Nikolić was member of the first team for four seasons, during which he won four SuperLiga and three Serbian cup titles. In total he had 82 appearances and scored 10 goals. On 22 August Serbian veteran midfielder
Slavoljub Srnić on a free transfer and joined Cypriot side
AEL Limassol. This ended his third spell at the club for which he played 208 games in total, scored 22 goals, won 6 Serbian SuperLiga titles and 3 Serbian Cup titles. The game was originally scheduled to be played on 1 November, but it was rescheduled to 18 October. Red Star won the game 6–0 and qualified for the Round of 16.
November In Serbian SuperLiga Red Star won all three games they played, witch kept them at the second place on the table, three points behind leading Partizan. In Champions League the club lost both games it played, against RB Leipzig at home and Young Boys in an away game. This secured them last place in the group with one game remaining. Draw for the Round of 16 of the
Serbian Cup was held on 7 November and Red Star were drawn to play a home game against
Radnički Niš. Game is scheduled to be played on 6 December
December In Serbian SuperLiga Red Star ended first half of the championship with three wins and a 1–2 defeat against
Partizan in the
Eternal derby. This kept them at the second place on the table, one behind leading Partizan. In Champions League the club lost its last game of the season against Manchester City at home, ending their run at the last place of the group. Red Star played second round of
Serbian Cup against
Radnički Niš and won 5–0. On 25 December quarter-finals draw took place on which Red Star was drawn against
OFK Vršac in a home game that will be played on 4 April 2024. On 17 December the club signed new contract with young fullback
Kosta Nedeljković until the summer of 2027. On 20 December, after the loss in the Eternal derby, Israeli coach
Barak Bakhar was sacked after just six months. His replacement was announced two days later, on 22 December - Serbian coach
Vladan Milojević. This will be Milojević's second spell at the club, after previously being Red Star's manager for two seasons between 2017 and 2019. In his first tenure he won two Serbian SuperLiga titles. Milojević joined the club on a -year contract.
January The club will organize mid-season training camp between 15 January and 2 February in
Paphos on
Cyprus during which they will play five friendly games. Kangwa represented
Zambia in all three group stage matches, scored one goal and was eliminated after ending on the third place of the group. Bukari represented
Ghana in two games and was also eliminated in the group stage. Djiga played in one game for
Burkina Faso and was eliminated in round of 16. At the start of the year Argentine right-back
Alex Vigo returned to
River Plate after his loan at the club expired and Red Star decided not to activate his buy-out option. He was at the club for a year, during which he gathered 16 caps and scored 3 goals. On 10 January club announced that they will be returning Serbian defender
Viktor Radojević back from the loan at
Grafičar. He is the product of the club's youth academy and this will be his first time playing for the first squad. On 14 January Serbian backup goalkeeper
Nikola Vasiljević left the club after years, most of which he spent on multiple loans. He joined Serbian side
Radnički Niš on a free transfer. On 22 January Serbian defender
Kosta Nedeljković signed the contract with English side
Aston Villa for an estimated fee of €9,000,000. He will remain part of the Red Star until the end of current season. On 31 January Ghanaian midfielder
Edmund Addo left the club in order to join Serbian side
Radnički Niš on a six-months loan. Addo arrived at the club at the start of this season and failed to make a debut for the first team.
February Serbian SuperLiga was resumed during February. Club played three games, and won all three of them. This kept them at the second place on the table, one point behind leading Partizan. On 1 February Serbian winger
Stefan Mitrović left the club in order to join the Italian side
Hellas Verona for an estimated fee of €1,300,000. He spent season and a half at the club, winning the Double in the previous season. On the same day two more players left the club on a loan until the end of the season. Zambian international midfielder
Kings Kangwa was loaned to Belgian side
Kortrijk for an estimated loan fee of €500,000 and the buy-out price of €1,000,000 at the end of the season. Kangwa was part of the club for season and a half, winning the Double in the previous season. Serbian midfielder
Uroš Kabić was loaned to Italian side
Torino with an agreed buy-out price of €2,000,000 at the end of the season. He joined the club at the start of this season. On 2 February Serbian forward
Uroš Sremčević joined the club on a three-years-long contract. He arrived from
Mladost Lučani for the record breaking transfer between two Serbian clubs of an estimated €2,000,000. On 19 February Serbian forward
Jovan Mijatović left the club in order to join US side
New York City FC for the undisclosed transfer fee estimated to be around €8,000,000. == Players ==