1
general::
Phrase(s): thrill someone to pieces [and] thrill someone to death; thrill someone to bits
Fig. to please or excite someone very much. • John sent flowers to Ann and thrilled her to pieces. • Your wonderful comments thrilled me to death.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, thrill to death. Give great pleasure, delight, as in I was just thrilled to pieces with our new grandson, or He was thrilled to death when he first saw the Himalayas. Both of these hyperbolic terms use thrill in the sense of "affect with sudden emotion," a usage dating from the late 1500s. Also see TICKLED PINK.
American Heritage Idioms