mirthful

"when hearts were young and gay"
"a poet could not but be gay, in such a jocund company"
"the jolly crowd at the reunion"
"jolly old Saint Nick"
"a jovial old gentleman"
"have a merry Christmas"
"peals of merry laughter"
"a mirthful laugh"

"an amusing film with a steady stream of pranks and pratfalls"
"an amusing fellow"
"a comic hat"
"a comical look of surprise"
"funny stories that made everybody laugh"
"a very funny writer"
"it would have been laughable if it hadn't hurt so much"
"a mirthful experience"
"risible courtroom antics"