Two of Hollywood's most enduring leading ladies have a beauty secret in common - and it's not a $300 serum or some bespoke facialist on speed dial. Reese Witherspoon and Julianne Moore both reach for the same humble drugstore staple when packing for a flight. The cleanser sitting in their suitcases? Plain old Cetaphil, the bottle your dermatologist probably recommended back in the '90s and is still recommending today.