The honeymoon is over for T.I. and his wife Tameka Cottle because TMZ has learned they were arrested tonight for alleged possession of a controlled substance.

T.I. Married

Law enforcement sources tell us L.A. County Sheriff's deputies took T.I. and Tameka into custody in West Hollywood.

The couple just got married on July 30 in Miami.

T.I. -- real name Clifford Harris Jr. -- is on federal probation after doing prison time on weapons charges.

We're told T.I. and Tameka are both in custody right now.