Tonight the 21st annual Screen Actor’s Guild awards airs live at 8 p.m. EST/5 p.m. PST on TBS and TNT. The star studded affair which will be held at the Shrine Auditorium in Los Angeles, Calif. will be stock full of surprise presenters, big honors and hopefully some noteworthy red carpet moments. Before you tune in for this evening’s shenanigans, check out these five things you need to know before tonight’s ceremony.