The Drew Barrymore Show Instagrammed THIS photo.
Her jacket is the Riley & Rae Hudson Plaid Jacket. Buy it here: MACY'S
Her pants are the Riley & Rae Tartan-Plaid Slim-Leg Pants. Buy them here: MACY'S
Her shirt is the Givenchy Chain-Trimmed Silk Blouse. Buy it here: SAKS FIFTH AVENUE
She is also wearing Jimmy Choo boots. They look like they might be the Jimmy Choo Mara Velvet Nubuck Knee Boots which you can buy here: BERGDORF GOODMAN