Mark Lawrence

 was a houseguest on Big Brother 1.

Mark was known in season 1 most notably for his showmance with fellow houseguest, Cris Peters. Mark started off the game in a strong, six-person alliance, which controlled the first half of the pre-jury phase. That all turned around when the alliance started crumbling, due to distrust in the group, and being seen as a threat. When two of his allies, Jay and Calliope, got evicted back-to-back in a Double Eviction, and Avery flipped to the other side, Mark, Cris, and Robin were left on the bottom. However, Robin won the next HoH, and Mark won his first competition, the Power of Veto. They were able to flip Omid and Samantha to their side, bringing control back to their side. Mark later won both the HoH and the PoV the following week, backdooring William, in fear of his duo with Thomas. Mark's game came to an end when Thomas won the following HoH, nominating Mark and Robin, and when Robin was pulled off the block, and Samantha was put in her place. Mark was evicted in the first part of the second Double Eviction in a 6-1 vote.

Trivia

 * Mark never voted in the Jury Phase of the game, not counting his jury vote.
 * Mark was the only HoH of the season to win the PoV in the same week and use it on one of his nominees.