I'm pretty sure that this is hand-drawn, but we're looking for something to match the photographed font used on this invitation - particularly a match for the capitals.

I suggest the keyword “spencerian”

https://www.myfonts.com/search/spencerian/

Milton One or Milton Two might work for you....

I was thinking along the lines of Samantha with the all of the fancy alts. 

Certainly handwritten, but beautifully done.

I'd suggest Mozart Script, which has the same casual flair but with lots of alternative glyphs to give it that special sparkle.

https://creativemarket.com/BlessedPrint/946338-The-Mozart-Script

Respective from daFonts is also nice with many flourishes and alternatives.

https://www.dafont.com/respective.font

Here's another with extensive alternatives and flourishes. Cardinal Script:

https://creativemarket.com/BlessedPrint/2380523-Cardinal-Italic-script-trio

Okay been going through my very large folder of script typefaces:

Belluccia, you gotta love the multitudes of alternatives and flourishes in this magnificent script family.

https://www.myfonts.com/fonts/correspondence-ink/belluccia/

You've got me hooked on scripts for the evening.

 

Thank you so much, everyone!!!!

We displayed them to the client and they liked Respective the best.