Amanda Seyfried lets out blood-curdling scream as she gets spooked by her daughter... after Thomas Sadoski split

Amanda Seyfried got quite the jump scare from her daughter Nina. 

The Mama Mia actress, 40, was enjoying a relaxing moment of singing until she was interrupted by the presence of Ghostface Killa, aka her nine-year-old daughter.

Video posted by Seyfried on Wednesday showed her singing the Joni Mitchell song A Case of You, her undivided attention focused on her musical instrument.

Sneaking in the background was Nina, who quietly approached her mother from behind while wearing the Scream mask. 

For several moments, the newly-single actress was unaware that Nina was in the room with her – until she looked up into the camera and realized she was not alone.

To Nina's delight, Seyfried let out a blood-curdling scream. 

The youngster jumped up in glee as her mother shrieked before reaching over to turn off the camera. 

Seyfried shares Nina and her brother Thomas, six, with her estranged husband Thomas Sadoski.

The exes recently announced they had split after nine years of marriage.

The couple said they had been 'separated for a while' and it was the 'right move' for the family.

Amanda and her husband confirmed their split earlier this month in a joint statement to PEOPLE.

They said: 'We have been separated for a while, and it's proven to be the right move for us and our family unit. We've got each other forever—and it's GOOD.'

The pair were last pictured together at an event on January 9, when Sadoski joined the actress at a party celebrating her Golden Globe nomination for The Testament of Ann Lee at Chateau Marmont in Los Angeles.

The Daily Mail reached out to representatives of the couple for comment at the time.

However, Amanda proved things were still amicable between the pair as she shared a snap of her estranged husband to her Instagram Stories that same week.

The photo saw him sitting at a table with a bearded dragon perched on his shoulder. '@thomassadoski is a #reptiledad,' she wrote on the snap.

The actress went on to share a poignant quote about living fully, forgiving others and keeping your heart open.

'Defend you heart, do whatever it takes to keep it open despite what it has been through. Forgive, not just others, but yourself, as well,' part of the quote read. 'Yes yes yes,' Amanda wrote underneath.

She also posted a cryptic quote which read: 'There's really not a difficult thing unless you decide it's a difficult thing. Otherwise, it's just the next thing you’re figuring out.'

It's unclear exactly how long the pair have been separated, but during their last public appearance in January, they appeared close as they posed for photos together.

In January, Amanda told Vogue that Thomas 'sacrifices a lot for me' amid her busy career.

'He also knows that, in this moment, the opportunities I’m being afforded are insane,' she added.

The duo met in 2015 while starring together in the off-Broadway play The Way We Get By.

They tied the knot during a private ceremony in California in March 2017, just days before the birth of their daughter.

Seyfried previously shared that they were both in 'bad relationships' when they first met.

The two crossed paths again while filming The Last Word, where they played love interests. Just months later, they were dating in real life.

The star, who was nine months pregnant at the time she tied the knot, had very practical reasons for wanting to get married ahead of giving birth.

She explained: 'I really wanted to have rings on in the hospital, you know? And what if something goes wrong, and he’s not legally my husband?'