The montage paid tribute to the stars and film industry professionals who passed away over the last 12 months, including Philip Seymour Hoffman, Paul Walker, Peter O'Toole and Shirley Temple.
Gandolfini, who has been posthumously nominated for awards at the SAGs and Independent Spirit Awards this year for Enough Said, was the most high-profile absentee.
The actor, best known for his role in HBO drama The Sopranos, appeared in more than 30 feature films including True Romance, In the Loop and Zero Dark Thirty.
Griffiths played Vernon Dursley in five Harry Potter instalments and also appeared in Withnail & I and The History Boys.
Only Fools and Horses actor Lloyd Pack was also a Potter veteran, starring as Barty Crouch in Harry Potter and the Goblet of Fire. His other film credits include Tinker Tailor Soldier Spy and Interview with the Vampire.
Gravity was the big winner at the BAFTAs with five wins in total, while 12 Years a Slave took home the prize for Best Film.
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Photo gallery - BAFTA red carpet in pictures: