Toni Colletteand estranged husbandDave Galafassiare clarifying that their decision to divorce came after a separation.On Wednesday, theHereditaryactress, 50, and Galafassi, 44, announced their split after 20 years of marriage in astatementon Instagram.The message has since been edited to begin, “After a substantial period of separation, it is with grace and gratitude that we announce we are divorcing.““We’re united in our decision and part with continuing respect and care for each other,” they added. “Our kids are of paramount importance to us and we will continue to thrive as a family, albeit a different shape. We’re thankful for the space and love you grant us as we evolve and move through this transition peacefully. Big thanks.“Toni Collette and Dave Galafassi in 2010.Gregg DeGuire/FilmMagicNever miss a story — sign up forPEOPLE’s free weekly newsletterto get the biggest news of the week delivered to your inbox every Friday.Collette and Galafassi share daughter Sage Florence, 14, and son Arlo Robert, 11.Before the announcement post, Collette shared a quote on her Instagram Story that read: “No matter what your current circumstances are, if you can imagine something better for yourself, you can create it.“Kristian Dowling/GettyThe initial announcement came as photos of Galafassi and another woman kissing at a beach the day before in Sydney, Australia, surfaced. The Daily Mailpublishedthe photos that also show the musician and the woman sitting together, holding hands in the water, and sharing multiple kisses.Reps for Collette did not respond to PEOPLE’s request for comment. A rep for Galfassi could not immediately be located.

Toni Colletteand estranged husbandDave Galafassiare clarifying that their decision to divorce came after a separation.

On Wednesday, theHereditaryactress, 50, and Galafassi, 44, announced their split after 20 years of marriage in astatementon Instagram.

The message has since been edited to begin, “After a substantial period of separation, it is with grace and gratitude that we announce we are divorcing.”

“We’re united in our decision and part with continuing respect and care for each other,” they added. “Our kids are of paramount importance to us and we will continue to thrive as a family, albeit a different shape. We’re thankful for the space and love you grant us as we evolve and move through this transition peacefully. Big thanks.”

Toni Collette and Dave Galafassi in 2010.Gregg DeGuire/FilmMagic

Toni Collette and Dave Galafassi arrive at G’Day USA 2010 Los Angeles Black Tie Gala held at Hollywood & Highland on January 16, 2010 in Hollywood, California

Never miss a story — sign up forPEOPLE’s free weekly newsletterto get the biggest news of the week delivered to your inbox every Friday.

Collette and Galafassi share daughter Sage Florence, 14, and son Arlo Robert, 11.

Before the announcement post, Collette shared a quote on her Instagram Story that read: “No matter what your current circumstances are, if you can imagine something better for yourself, you can create it.”

Kristian Dowling/Getty

MELBOURNE, AUSTRALIA - AUGUST 16: Actress Toni Collette and husband Dave Galafassi arrive at the 2006 ARIA Hall of Fame at the Regent Theatre on August 16, 2006 in Melbourne, Australia. The annual ceremony held by the Australian Recording Industry Association recognises and inducts legendary artists who have had an impact on Australian music culture with inductees voted on by the ARIA Board. (Photo by Kristian Dowling/Getty Images)

The initial announcement came as photos of Galafassi and another woman kissing at a beach the day before in Sydney, Australia, surfaced. The Daily Mailpublishedthe photos that also show the musician and the woman sitting together, holding hands in the water, and sharing multiple kisses.

Reps for Collette did not respond to PEOPLE’s request for comment. A rep for Galfassi could not immediately be located.

source: people.com