Paul Bettany wore his left arm in a sling following a mystery injury as he stepped out for a walk with his wife Jennifer Connelly in New York on Wednesday.

Last month, Paul was spotted roaming around the big apple without a sling, suggesting his injury is quite fresh.

The actor and his actress wife Jennifer, both 53, whom have been married for 21 years, enjoyed some fresh air as they walked their dog.

Paul seemed in great spirits as he appeared with his glamorous wife for a second time this week.

He looked trendy in a faux-fur collared leather jacket and green cargo jeans, while Jennifer looked stylish in a khaki green jacket and blue jeans.

Jennifer and Paul, who hails from London, first met in 2001 while working on A Beautiful Mind.

Paul has previously said he had a crush on Jennifer as a teen - when he watched her in the film Labyrinth, which was released in 1986.

They wed on January 1, 2003 in Scotland.

They welcomed two children together: Stellan, now 21, and Agnes, now 13.

She recently shared a sweet snap of her and Agnes on her Instagram page in honor of daughter Agnes' 13th birthday.

Jennifer was previously married to David Dugan - and they welcomed son Kai, now 27.

Jennifer has previously spoken out about becoming a mother and how that has changed her.

'Becoming a mother has made all the difference in terms of learning to take more responsibility for myself and my life,' she told Anderson Cooper on Anderson Live in June 2012, via People magazine.

'Parenthood changed the way I do everything,' she said.

'The biggest thing for me is wanting my kids to grow up safely and have happy lives. 

'To me, that's enough.'