Pratt, 38, was seen greeting a friend as he took his son, Jack, to church here and the actor's ring was missing from his left hand, reported Us weekly.
Faris, 40, and Pratt announced on August 7 that they were parting ways after eight years of marriage.
In a joint statement, they uploaded on their respective social media accounts, the actors wrote that they were legally separating and requested for privacy.
"Anna and I are sad to announce we are legally separating. We tried hard for a long time, and we're really disappointed. Our son has two parents who love him very much and for his sake we want to keep this situation as private as possible moving forward.
The duo met in 2007 on the sets of "Take Me Home Tonight". They got married on July 9, 2009, in Bali, Indonesia. Their son, Jack, now four, was born in August 2012.
Disclaimer: No Business Standard Journalist was involved in creation of this content