The suspect reportedly illegally entered the NCIS: Los Angeles actor's home just after 2am local time, alerting LL Cool J in the process.
Law enforcement sources told TMZ that LL Cool J confronted and detained the accused burglar until police arrived to arrest the man.
The suspect is apparently now in custody and will be booked on a burglary charge later today.
LL Cool J has yet to comment on the incident.
The rapper's professional life made headlines last month when it was confirmed that his and Chris O'Donnell's real-life mothers will appear on the new NCIS: Los Angeles season.
> LL Cool J: 'I paved the way for Drake with romantic music genre'