Prince Charles, Prince Louis, seen in adorable newly released photos

Prince Charles is seen as a hands-on grandfather in adorable new photos with Prince Louis. (Clarence House)

Prince Charles was pictured with Prince Louis in adorable new photos released Sunday as part of a series of images taken to mark the Prince of Wales’ 70th birthday.

Charles was seen holding Louis in photos published in The Sunday Times magazine. In one image, Louis grabs onto Charles’ face during the family photo as the 70-year-old laughs, while another photo shows an intimate moment between the Duchess of Cambridge, the 6-month-old and Charles.

Images are part of a set to mark His Royal Highness's 70th birthday. Prince Charles, Prince of Wales with Prince Louis of Cambridge and Catherine, Duchess of Cambridge after a family portrait photo-shoot in the gardens of Clarence House on September 5, 2018 in London, England. (Chris Jackson/Getty Images for Clarence House).

Photographer Chris Jackson told The Sunday Times the pictures capture Charles as a “hands-on grandfather.” He said it was “the happiest” he has seen the Prince of Wales.

“It was lovely chaos with the children,” Jackson said. “He is a very hands-on grandfather. He was holding hands with George and Charlotte, and bouncing Louis up and down for a long time. George was very happy on the prince’s knee.”

“They have a great relationship that’s a little more established, as George is a bit older,” the photographer added.

Images are part of a set to mark His Royal Highness's 70th birthday. Prince Charles, Prince of Wales holds Prince Louis of Cambridge after a family portrait photo-shoot in the gardens of Clarence House on September 5, 2018 in London, England. (Chris Jackson/Getty Images for Clarence House).

Charles celebrated his 70th birthday with a party at Buckingham Palace thrown by his mother, Queen Elizabeth II. Two family portraits taken on Sept. 5 were released last week showing Charles with his wife Camilla, sons Prince William and Prince Harry, their wives Kate and Meghan and his grandchildren: 6-year-old Prince George, 3-year-old Princess Charlotte and Louis.

Images are part of a set to mark His Royal Highness's 70th birthday. Prince Charles, Prince of Wales with Prince Louis of Cambridge and Catherine, Duchess of Cambridge after a family portrait photo-shoot in the gardens of Clarence House on September 5, 2018 in London, England. (Chris Jackson/Getty Images for Clarence House).

Jackson also posted on Instagram about the "incredible privilege" to document the intimate moments ahead of Charles' landmark birthday.

Images are part of a set to mark His Royal Highness's 70th birthday. Prince Charles, Prince of Wales works in the Gardens of Highgrove House on July 19, 2018 in Tetbury, United Kingdom. (Chris Jackson/Getty Images for Clarence House)

"I’ve spent much of the last year documenting some intimate and ‘behind the scenes’ moments with The Prince of Wales to celebrate his 70th Birthday - It really has been an incredible privilege to create such a unique set of images and a huge amount of fun at the same time," Jackson captioned a post.

Images are part of a set to mark His Royal Highness's 70th birthday. Prince Charles, Prince of Wales and Queen Elizabeth II walk out ahead of the formal opening of the Commonwealth Heads of Government Meeting (CHOGM), in the ballroom at Buckingham Palace on April 19, 2018 in London, United Kingdom. (Chris Jackson/Getty Images for Clarence House)

The Associated Press contributed to this report.