Sarah Michelle Gellar’s cameo in the new I Know What You Did Last Summer was so hush-hush, even her scene partner had no clue! She kept it under wraps for months, and the director didn’t even put her scene in the script pages. Fans are debating if this is the best horror cameo ever or just a nostalgia grab. Either way, seeing Helen back (even in a dream) was wild! #Entertainment #Movies #SarahMichelleGellar