The 23-year-old singer and 23-year-old Good Wife actor reunited seven years after starring in the Broadway musical 13 together.
“Lil 13 reunion,” Graham captioned the Instagram pic.
Ari and Graham reportedly grabbed dinner at Red O restaurant this past weekend in Los Angeles.
“They had a wonderful time. Both of them, and their guests, were an absolute delight and stayed late into the night,” a source told E! News. “They treated everyone amazing!”