in good spirits
Also, in high spirits. Happy, cheerful, as in Jane was in good spirits today. [Early 1700s] However, high spirits also can indicate liveliness and vivacity, as in The children were in high spirits at the prospect of a trip to the circus.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.