"Should I be drinking coffee at 2.58 a.m.?" – even Kaley Cuoco wasn't sure of her middle-of-the-night caffeine fix last night. The "Big Bang Theory" star, currently going full-throttle with promo for upcoming HBO Max series "The Flight Attendant," was up at all hours on Tuesday night as she juggled her West Coast location with needing to be up for her "Good Morning America" appearance today. Kaley, 34, updated her Instagram stories with an admission she'd just woken up when most people are fast asleep. Check it out below.