back on the scene as 's Amanda Rollins.

's is already filming its season 24 finale, and photos from set show the alum appearing alongside (Olivia Benson) and (Elliot Stabler). Reprising the role she played for 12 seasons, the 43-year-old actress was pictured in a tan trench coat as she walked alongside her former coworkers.

PEOPLE confirmed Giddish would be stepping back into Rollins' shoes for the season finale after she departed in the show's fall finale last December. Fans last saw her character have a happy ending of sorts on the series. Rollins tied the knot with Assistant District Attorney Dominic Carisi (Peter Scanavino), and her home life may be the focus of her return to .

Rollins is apparently pregnant, and will share the joyful news as she lends her expertise on the season 24 finale,

first reported.

Giddish confirmed she was leaving in August — after 12 years on the NBC crime drama.

"Playing Rollins has been one of the greatest joys and privileges of my life. I've been so fortunate to be a part of the family for the last 12 years," Giddish said in a statement to PEOPLE at the time.

"There is simply no other character on TV like Rollins. She's grown and changed, and I have as well. I started on this show when I was in my late 20s and I'm grateful I got to spend so many of my adult years with Rollins in my life.

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airs Thursdays at 9 p.m. ET on NBC.