Princess Anne's 70th birthday just keeps on giving.

The Princess Royal turned 70 back on Aug. 15, when the Royal Family released a series of three portraits from a birthday photoshoot. Now, as per tradition, Princess Anne has sent postcards to royal fans who sent her birthday well wishes. This year's gift for the fans: a message from the princess and a previously unseen birthday portrait.

Princess Anne: New 70th birthday portrait and fan postcard

Instagram page The Royal Mail Box chronicles the replies sent by the Royal Family to fan mail such as birthday greetings. This week, the devoted page revealed the card sent in return by Princess Anne following her 70th birthday.

"The Princess Royal appreciated your kind thoughts sent on the occasion of her 70th birthday, and sends you her thanks and best wishes for the future," the card reads.

Fans appear thrilled by the new portrait and kind message, too. The Royal Mail Box wrote: "I received this lovely reply for Princess Anne's 70th Birthday! I am very impressed with the quality of the card, it is beautiful!"

Princess Anne hit age 70 in style with 2020 birthday photos

Back in mid-August, the Royal Family celebrated Anne's birthday with a special documentary and a series of three other birthday portraits (two of which are seen below).

Princess Anne spent her birthday in Scotland with husband Sir Tim Laurence. Since then, she's reportedly paid a visit to her parents, Queen Elizabeth II and Prince Philip, while they were staying at Balmoral Castle. On Sept. 18, she additionally stepped out to meet with the 30th Signal Regiment, on what was the 71st anniversary of the Queen's Gurkha Signals.