Jon Voight: 'It must've been pretty severe' for Angelina Jolie to file for divorce from Brad Pitt

NEWYou can now listen to Fox News articles!

Angelina Jolie's father, Jon Voight, seems just as shocked as the rest of the world upon hearing that the actress filed for divorce from Brad Pitt after two years of marriage.

"It must have been pretty severe for this to happen," Voight tells ET. "I don't know much yet, but [I] plan on speaking to her and the kids very soon."

WATCH: Brad Pitt Talks Marriage and Children -- 'Angie and I Were Aiming for a Dozen' Kids

The 77-year-old actor adds that he will be there to support Jolie and his six grandchildren as he's been doing.

On Monday, Jolie filed for divorce citing irreconcilable differences, and lists the separation date as Sept. 15, 2016, according to court documents obtained by ET. The 41-year-old actress is asking for physical custody of their six children -- Maddox, 15, Pax, 12, Shiloh, 10, Zahara, 11, and twins Vivienne and Knox, 8.

EXCLUSIVE: Brad Pitt on Working With Angelina Jolie -- 'She Knows When I'm Faking It Better Than Anyone Else'

An attorney for Jolie, Robert Offer, told the Associated Press on Tuesday that the decision was made "for the health of the family."

Voight, 77,did not attend his daughter's wedding back in August 2014, but did issue a statement after news broke of her very private nuptials in France. "It seems like it was a beautiful simple ceremony with all the kids involved," he said at the time. "Must have been a lot of fun. I am very happy for them."

MORE: Angelina Jolie Reveals Her Kids Think She and Brad Pitt Are 'Dorky Mom and Dad'

He's also gushed over Pitt to ET in June 2013 after Jolie spoke out about her decision to have a double mastectomy to reduce her chances of getting breast cancer. "You want your children to be surrounded by love and I like Brad very much," he said.

Jolie and Pitt, 52, met in 2005 while on set of their film "Mr. & Mrs. Smith," while he was still married to Jennifer Aniston. The last sighting of the two together was in July, when Pitt and Jolie took their twins out for a birthday breakfast at the Griddle Cafe in West Hollywood, California.