Now, the palace has released two more photographs to commemorate the royals momentous birthday.
One of the sweet snaps shows Prince Charles cradling a smiley Prince Louis. The royal sweetly laughs as the toddler looks over into the distance.
The other photograph released is another candid of the Royal Family's group shot.
In this portrait a seven-month-old Louis attempts to grab his grandfather's face, while the group laugh.
The pictures were taken by Chris Jackson in the garden at Clarence House in September 2018.
Jackson said: “I was delighted to have been asked to take these portraits of The Prince of Wales surrounded by his family to celebrate the important milestone of his 70th Birthday. It was particularly special to capture such an informal and relaxed family portrait over a fun afternoon in the gardens of Clarence House.”