We can't even imagine what she must be going through.

Billie Lourd just broke her silence on the shocking deaths of mom Carrie Fisher and grandmother Debbie Reynolds, who died just one day apart last week.

"❤👩‍👩‍👧❤ Receiving all of your prayers and kind words over the past week has given me strength during a time I thought strength could not exist. There are no words to express how much I will miss my Abadaba and my one and only Momby. Your love and support means the world to me," she captioned a throwback photo of the trio.

Lourd was the Star Wars icon's only child, from her relationship with ex Bryan Lourd. The 60-year-old actress passed after suffering a massive heart attack on a flight from London to LA, and her Singin' In the Rain screen legend mother passed the very next day after suffering a stroke brought on by grief.

Our heart goes out to Billie and her entire family.