It's business as usual for Taylor Kinney.
Days after his split from Lady Gaga, the Chicago Fire star is back to work, on the set of the hit NBC drama.
WATCH: Lady Gaga & Taylor Kinney Break Up: A Timeline of Their Engagement -- In the Former Couple's Own Words
Kinney's co-star Kara Killmer shared a picture of the Chicago Fire crew back in action on Thursday, showing the 35-year-old actor cracking a smile for the cute snap.
"We're baaaaack!!!" she captioned the shot, posted to her Twitter.
While Kinney appeared to be in high spirits with his co-stars, he hasn't addressed his split from the "Born This Way" singer.
Lady Gaga broke her silence on the breakup with an emotional Instagram on Tuesday, where she asked for fans to please "root them on."
"Taylor and I have always believed we are soulmates," she wrote. "Just like all couples we have ups and downs, and we have been taking a break."
"We are both ambitious artists, hoping to work through long-distance and complicated schedules to continue the simple love we have always shared," she continued. "Please root us on. We're just like everybody else and we really love each other."
WATCH: Lady Gaga Shows Off Tiny Pink Swimsuit in Mexico Amid Taylor Kinney Breakup
Kinney and Gaga started dating five years ago after meeting on the set of her music video for "You and I." The two got engaged on Valentine's Day of last year.
See more on their breakup in the video below.