The red-headed actress was pictured dashing around NYC on Tuesday afternoon (17 September) and appeared to be ready for a workout in a pair of trainers, some sporty leggings, a zip-up sports top and a leather jacket.
She also kept a low-profile by donning a black cap and a pair of sunglasses and tied her long hair into a loose side bun, so that it was out of her face.
It definitely seemed like Lindsay was on a mission, as she hot-footed it across the streets of the Big Apple, while chatting to a male friend and checking her phone.
The Hollywood star - who completed a 90-day court-ordered stay in rehab last month - recently admitted that she is now taking some time to focus on her career, as well as her well-being.
Writing on her blog at the beginning of September, Lindsay said: "I'm the happiest and healthiest when I'm working and I think this is an opportunity for me to focus on what I love in life."
However, it still isn't all smooth sailing.
Last Thursday (12 September), her personal life hit a rocky patch when it was reported that her mum Dina had been arrested for a DUI, with police apparently claiming that her blood alcohol level was more than double the legal limit.
According to TMZ, Lindsay didn't find out about her mother's arrest until the story broke the following morning.
Also seen in New York yesterday, and perhaps offering some support and comfort to Lindsay, was her younger sister and fellow actress, Ali.
19-year-old Ali was pictured wearing an all black ensemble, including a pair of racy fishnet-style tights and some chunky boots.