The guests
Cameos
Former houseguests and other franchise figures who appeared during Big Brother 18.
| Guest | When | Appearance |
|---|---|---|
| Cody | Week 1, premiere aired Wed Jun 22, 2016 | Appeared in Paulie's introduction segment. |
| Cody | Week 4, aired Thu Jul 21, 2016 | Commented on Paulie's game as a guest commentator. |
| Vanessa | Week 4, aired Thu Jul 21, 2016 | Commented on Tiffany's game as a guest commentator. |
| Jason | Week 5, aired Thu Jul 28, 2016 | Commented on Da'Vonne's game in an alumni segment. |
| Meg | Week 5, aired Thu Jul 28, 2016 | Commented on James's game in an alumni segment. |
| Hayden | Week 5, aired Thu Jul 28, 2016 | Commented on Nicole's game in an alumni segment. |
| Boogie | Week 5, aired Thu Jul 28, 2016 | Commented on Frank's game in an alumni segment. |
| Zingbot | Week 8, aired Wed Aug 17, 2016 | Visited the house to deliver zings before the Power of Veto competition. |
| Rachel | Week 8, aired Thu Aug 18, 2016 | Appeared with Brendon in a family update featuring their baby. |
| Brendon | Week 8, aired Thu Aug 18, 2016 | Appeared with Rachel in a family update featuring their baby. |
| Jessie | Week 9, aired Fri Aug 19, 2016 | Took part in the carnival's dunk-tank game. |
| Jeff | Week 11, aired Thu Sep 8, 2016 | Appeared with Jordan for an update on their family. |
| Jordan | Week 11, aired Thu Sep 8, 2016 | Appeared with Jeff for an update on their family. |
| Derrick | Week 12, aired Tue Sep 13, 2016 | Discussed the remaining houseguests as a guest commentator. |