Rex Features
The 28-year-old actor, who currently plays Benedict 'Eggs' Talley in HBO's Blood, has reportedly joined the legal drama as a series regular.
Brooks will play a new character called Malcolm Bennet, an associate at the prestigious LA law firm.
He has previously starred in season two of ABC's Desperate Housewives as the murderous Matthew Applewhite, who was shot dead in the season finale.
It is not yet known whether Brooks will depart True Blood, on which he was recently made a series regular.
