Sean Penn enjoyed a romantic stroll through the streets of Paris with his girlfriend Valeria Nicov on Monday.The actor, 64, was spotted walking around the City of Love with the 30-year-old model on his arm and what appeared to be a toothpick in his mouth.He kept his hands in the pockets of his pants, and Nicov hooked her arms with his as they walked hip-to-hip.At one point, they also intertwined their fingers and held hands while his girlfriend was looking at her phone. The Daddio star was first romantically linked with the Moldovan actress when they were pictured making out during a night on the town last month. Sean Penn enjoyed a romantic stroll through the streets of Paris with his girlfriend Valeria Nicov on Monday. The actor, 64, was spotted walking around the City of Love with the 30-year-old model on his arm and what appeared to be a toothpick in his mouth While they walked, the silver screen star — who has been trying to quit smoking for years — had what appeared to be a toothpick in his mouthDuring their outing, Penn put on a casual display and dressed for comfort in an all-black, cozy look.He zipped up a black bomber jacket, which he layered over a blue, plaid button-down shirt. The two-time Oscar winner also sported dark gray cargo pants and white sneakers. At his side, the statuesque model coordinated her outfit to his and also sported a dark ensemble. She donned a black sweatshirt paired with skintight leggings and threw on a navy blue, pinstriped duster jacket. She threw up her dark brunette tresses into a messy ponytail and appeared to be wearing little to no makeup.While they walked, the silver screen star — who has been trying to quit smoking for years — had what appeared to be a toothpick in his mouth.When he was 40, he revealed that he quit smoking for his birthday, per The Guardian. However, as recently as this year — and even in between makeout sessions with his girlfriend during their date in September — he’s picked up the habit again.  He kept his hands in the pockets of his pants, and Nicov hooked her arms with his as they walked hip-to-hip During their outing, Penn put on a casual display and dressed for comfort in an all-black, cozy look The pretty woman, who resembles Kendall Jenner, looked down at her cell phone  At his side, the statuesque model coordinated her outfit to his and also sported a dark ensemble. She donned a black sweatshirt paired with skintight leggings and threw on a navy blue, pinstriped duster jacket When he was 40, he revealed that he quit smoking for his birthday. Back then, he said his birthday was a ‘disaster’ because he forced himself to kick the habit and quit smoking for good However, as recently as this year — and even in between makeout sessions with his girlfriend during their date in September — he’s picked up the habit againBack then, he said his birthday was a ‘disaster’ because he forced himself to kick the habit and quit smoking for good. ‘I had always told myself that I really should quit smoking at 30. OK, 35. Always, 40 was: there’s no choice any more, you just have to do it.’ He continued: ‘It was time not to be a slave to this nonsense, you know? ‘I mean, if I could smoke eight cigarettes a day, I’d smoke the rest of my life. But it’s worse than that with me. I smoke four packs like that.’