be thrilled to bits

be thrilled to bits

To be ecstatic; to be very pleased and excited. A: "I really hope Mary enjoys her surprise birthday party." B: "I'm sure she'll be thrilled to bits!" I was thrilled to bits to hear that I'd been selected for a literary award in New York City.
See also: bit, thrill

be thrilled to bits

  (British, American & Australian informal) also be thrilled to pieces (American informal)
to be extremely pleased 'So what did your parents say when they heard you were pregnant?' 'Oh, they were thrilled to bits.'
See also: bit, thrill