League One side Gillingham have signed Charlton Athletic centre-back Harry Lennon on loan until 3 January.
The 19-year-old, who has made three appearances for the Addicks, had a spell at Cambridge earlier this season.
Charlton youth academy graduate Lennon featured three times for the League Two club before being recalled in October.
Meanwhile, 21-year-old Gills centre-back Callum Davies has joined Conference side Dover Athletic on a deal until 4 January.
Davies has made eight appearances for the Gills this season.