Prince Harry’s recent dash to Ukraine has rubbed his estranged brother Prince William the wrong way, according to a report.

The Duke of Sussex, 40, traveled to the war-torn country last week to meet with dozens of wounded soldiers in the Ukrainian city of Lviv.

The Daily Mail reports that the Prince of Wales, 42, was left feeling “fuming” at palace officials after his recent trip, as he had previously been refused a similar one.

William had reportedly been campaigning to make a similar visit to Ukraine ever since Russia launched its invasion in February 2022 — but officials “firmly rejected” the prince’s request to make a similar trip over safety fears.

The prince is said to have voiced his frustration to Kensington Palace staffers and was left “rankled” when he found out that the Invictus Games founder had made the unannounced journey as part of his ongoing work with wounded veterans.

Still, William did pay a visit to Estonia, one of Ukraine’s neighbors, last month, where he donned combat fatigues and rode in a tank as he joined British troops on a field exercise.

The future king braved the freezing temperatures to meet with soldiers and military servicemen near the Russian border.

The father of three was photographed in a Challenger 2 tank before boarding an armored fighting vehicle.

William, 42, also visited 900 British troops stationed near the Russian border, including soldiers of the Mercian regiment — of which he is colonel-in-chief.

The Post has reached out to Kensington Palace for comment.

Harry, for his part, visited the Superhumans Center, an orthopedic clinic in Lviv that treats and rehabilitates wounded military personnel and civilians, to see top-notch services provided in a country in the midst of war.

The center provides prosthetics, reconstructive surgery and psychological help free of charge.

The Duke of Sussex, who served 10 years in the British Army, has made helping injured soldiers one of his most prominent causes.

His surprise Ukraine trip came after he spent two days at a London court appealing to win back a taxpayer-funded security detail for him and his family, which they were stripped in 2020.

The feuding brothers have become increasingly estranged since Harry and his wife, Meghan Markle, quit royal life in 2020 and hightailed it across the pond.

The final nail in the coffin proved to be Harry’s bombshell memoir, “Spare,” which hit shelves in January 2023 and left no stone unturned on life in the palace.