Adams, who played Duchess Meghan’s on-screen husband Michael Ross, shared a total of 11 posts on Instagram to mark the occasion.
Captioning the first, which sees him posing in a suit, he wrote: “This week the last episode of 'Suits' will air and the nearly 10-year journey we’ve all been on together will finally be over.
“So it seems right to post some photos the next couple of days from the early days. This photo was from the first fitting I ever had for Mike Ross.”
The fourth post featured a snap of his former co-star Duchess Meghan posing with her script in a filtered snap which he simply captioned with her character’s initials "RZ."
He went on to share several more behind-the-scenes snaps of the cast, including several more of Duchess Meghan.
A second shot saw the dressed-down actress wearing a tank top as she posed outside her trailer.
He went on to share several snaps of Prince Harry’s wife posing on the set of a photo shoot, including one that saw her lounging on a sofa in a pencil skirt and heels.
In the same post, he added a black-and-white picture of Duchess Meghan dressed in a bathrobe and a pair of stilettos.
Several other shots show Meghan alongside former co-star Sarah Rafferty, who plays Donna Paulsen on the legal drama, as well as a whole cast group photo.
Meanwhile, another candid shot saw Duchess Meghan taking a stroll with an umbrella during a rainy day in Toronto, where the show was filmed.
The 38-year-old left "Suits" in 2017 with her final episode airing in April last year, just a month before she wed Prince Harry.
Duchess Meghan's co-stars were invited to her wedding at Windsor Castle in May 2018, and some also made the guest list at her lavish baby shower in New York.
In other royal news, we told you how Meghan and Harry made a secret $5,400 donation in four-month-old Archie's name to help build a Mozambique swimming pool.
Plus, we shared how the Duchess of Sussex will speak out on gender violence while on her royal tour to South Africa with Harry.
And Duchess Meghan this week dazzled in $11,000 Valentino dress as she arrived with Harry for pal Misha Nonoo’s lavish Italian wedding.
This article originally appeared in The Sun.