Grace (someone) with (one's) presence phrase
To pay someone a visit. Often used ironically to imply that one has arrived late or deigned to appear or show up.
"Thanks for gracing us with your presence," John told Mary ironically when she came to the party late.
Will he be gracing us with his presence tomorrow night?
Last night, John graced us with his presence half an hour after the party started.
The verb "grace" must be conjugated according to its tense.
The origin of this phrase is not clear.