“That is SO, SO COOL!” @pchistorian exclaimed. “Love you both SO much. So… Hollywood is not so big as we were led to believe!”
“OMG you guys are my idols, I’m so happy to see you both in the same picture!!!” @abby_and_jessica_ncis added.
And @susanhardstock wrote: “I’m so glad to see these two together.”
Several other fans also commented to praise Holly’s short yet unforgettable time on the series as their favourite NCIS director.
For the post, Holly represented her Canadian background with a Canadian Tire baseball cap, while Perrette is still sporting her fiery yellow and orange hairstyle.
The former NCIS actress got her first big break in the 1990s on another CBS drama, Picket Fences, opposite Tom Skerritt.
She has since starred in a number of popular US dramas, including Motive, Designated Survivor, Lucifer and Tiny Pretty Things.
Holly most recently appeared in the Canadian legal drama Family Law in a recurring role, and returned for a second season last year.
Her reunion with Perrette came shortly after CBS announced some good news for fans of their ever popular NCIS franchise.
Although spin-off NCIS: Los Angeles was cancelled earlier this year, both the flagship show and its new offshoot, NCIS: Hawaii, were renewed for another season.
The 21st season of NCIS will premiere later this year, joined by a third instalment for Jane Tennant (Vanessa Lachey) and the Pearl Harbour task force.
Sadly, Perrette won’t be a part of the team after leaving the series at the end of season 15.
She has confirmed she has no plans to return to the series or drop in for a guest appearance, and officially announced she had retired from acting in 2020.
NCIS season 20 continues Mondays on CBS in the USA and is available to stream on Disney+ in the UK.