Tom Welling announces engagement as former co-star Allison Mack heads to court on sex trafficking charges

Tom Welling poses at the premiere of "Draft Day" in Los Angeles, on an April 2014 file photo. (Reuters)

"Smallville" star Tom Welling has proposed to his longtime girlfriend Jessica Rose Lee and is celebrating his engagement, while former co-star Allison Mack heads to court on sex trafficking charges linked to her time in the group NXIVM.

On Monday, Welling shared a FaceTime screenshot of himself and Lee with the caption, “Love: from half way around the world."

The former "Smallville" hero is said to be in Queensland, Australia, while Lee is currently in Barcelona, Spain. In the several hashtags Welling used for the photo, one of the words he tagged was "fiancé."

The couple has seemingly been engaged for a few months, but this is the first time Welling took to social media to share the news.

Back in February, Lee showed off her engagement ring finger in an Instagram post of the couple which read, “To my perfect fiancé- I love you to infinity and beyond. Thank you for all of your unwavering support and super-human love. I am so blessed to have you in my life.”

The news of Welling's engagement comes as former co-star Allison Mack prepares to head to court for her involvement in an alleged sex cult.

Prosecutors said the 35-year-old worked as a slave “master” and "pimp" recruiting unsuspecting women to join NXIVM. She then required the women she recruited to engage in sexual activity with Keith Raniere, the cult's leader, who paid Mack in return.

After her arrest last week, the former "Smallville" actress pleaded not guilty to sex trafficking in federal court in Brooklyn on Friday, April 20.

A rep for Welling did not immediately return Fox News' request for comment regarding Mack's recent arrest.

Allison Mack with co-star Kristen Kreuk, who was also reportedly involved in the sex cult with Mack. (Reuters)

The Associated Press contributed to this report.