This is the original art for the back cover of Star Wars Treasury #1 (1977) published by Marvel Comics. This issue was a large-size reprint of Star Wars #1-3. This cover was penciled by Rick Hoberg and inked by Dave Cockrum.
I love the billowy cape of Princess Leia as she holds court over the rest of the characters like a Christmas tree angel (that is a lot of fabric). A fabulous blast from the past!