Charlton have been placed in Southern Group A of the Papa John's Trophy alongside Colchester United and Gillingham.
The Addicks will also be joined by one of the eight invited U21 clubs following Thursday's draw, which supporters can watch live on Sky Sports from 11.30am.
Invited clubs (Southern)
- Arsenal U21
- Aston Villa U21
- Brighton & Hove Albion U21
- Chelsea U21
- Crystal Palace U21
- Southampton U21
- Tottenham Hotspur U21
- West Ham United U21
All Southern Group A fixture details will be communicated once confirmed.
Carabao Cup
Meanwhile, the Addicks have been allocated ball seven for the Carabao Cup first round draw, which will take place from 2.30pm on Thursday, June 23rd.
Carabao Cup round one fixtures will take place in the week commencing August 8th.