Malaysians have stripped federal control away from Barisan Nasional (BN) coalition, the world's longest-running government.
This historic moment now ensures that Malaysia has a change of government for the first time since its Independence in 1957.
Last night, when Dr Mahathir was being sworn in as Malaysia's 7th Prime Minister by Yang di-Pertuan Agong at Istana Negara, the sense of public euphoria on display near the palace was palpable
According to Malaysiakini's report, the area was filled with the sound of trumpets and incessant car horns as the people celebrated Pakatan Harapan's victory.
"Goosebumps," a tutor from Damansara, who was quoted by Malaysiakini, summed up what Malaysians were feeling after the historic GE14 results.
"It was such an honour to stand with thousands of other Malaysians outside of Istana Negara tonight. The energy was so amazing and everyone was so unified. What a surreal experience to see my country take a step towards a better future," wrote a Malaysian, Aida, on her Twitter after the swearing-in ceremony.
Earlier today, after PM Dr Mahathir performed the Friday prayers at the National Mosque, a huge crowd had gathered to greet him:
Meanwhile, international leaders have been congratulating Malaysians on their participation in a hard-fought election campaign
While the U.S. Department of State congratulated Malaysians, Australian Senator congratulated Tun Dr Mahathir on his magnificent victory in Malaysia.
"We congratulate the people of Malaysia on their participation in a hard-fought election campaign. Malaysians from all parties, states, and backgrounds engaged in the electoral process in large numbers peacefully and with great enthusiasm," the U.S. Department of State spokesman Heather Nauert said in a statement.
The Australian Senator, meanwhile, is seen in a video congratulating Dr Mahathir, saying, "Dr Mahathir will become the world’s oldest leader at 92-year-old."
"I think he will bring great wisdom, great experience to the role in Malaysia and anyone who's interested in the politics of Malaysia and perhaps the recent politics of Malaysia without dwelling on it too much can’t but be impressed by the victory.
"Let me make one last point and that is, that Dr Mahathir has given a pledge to uphold the rule of law and importantly to prosecute those who have breached it.
"I think it's an ominous sign for some who have engaged in less than decent practices across Malaysia," he can be heard saying in the video below.
Singapore PM Lee Hsien Loong, on the other hand, said that as Malaysia's closest neighbour, "We can do much more together"
While congratulating Dr Mahathir on being sworn in as the 7th Prime Minister of Malaysia, PM Lee Hsien Loong said that he wishes "Tun Mahathir and his team every success", adding that he hopes to "catch up with him in person" soon.
"Malaysia is a vital partner of Singapore, and our people share strong and deep bonds. I look forward to working with Tun Mahathir and the new government to enhance our cooperation," read PM Lee Hsien Loong's Facebook post from last night.
In a separate Facebook post, PM Lee had also commented saying that the outcome of the Malaysian election clearly represents a major change in Malaysian politics.
"As Malaysia's closest neighbour, we have a vested interest in Malaysia's stability and prosperity. While Malaysian politics are for Malaysians to decide, Singapore wishes Malaysia all the best in its political development," he said on Wednesday.
Other Singapore leaders also remarked on the results
Singapore's Deputy Prime Minister Tharman Shanmugaratnam took to his Facebook to say that the results showed "a clear vote for change in Malaysia".
"And it was across the board - Malays, Chinese, Indians and even the Dayaks in Sarawak. Wish Malaysia well, and hope we continue to work together for the mutual good of our people," Tharman wrote on his Facebook post on Wednesday.
Speaker of Parliament Tan Chuan-Jin called the election results "stunning".
"Our Malaysian friends have made their choice and spoken out decisively. We look forward to working with the new Government and leaders, and to continue to strengthen the friendship and co-operation between our two countries," he posted on Facebook.
Presidential Spokesperson of the Philippines, while congratulating Dr Mahathir, cited Malaysia's role as a "dependable" neighbour
"Prime Minister Mahathir is an old friend of the Philippines and his fresh mandate augurs well for the deep relations between the Philippines and Malaysia," Presidential Spokesperson Harry Roque said in a statement.
"Malaysia is a brother nation and dependable partner of the Philippines for having played a constructive role towards the attainment of peace and stability in Mindanao.
"We are thus confident that the strong partnership between our countries would continue to be enhanced in the years to come," the Presidential Spokesperson added.
Exiled former Thai Prime Minister Thaksin Shinawatra, on the other hand, took to his official Twitter account to leave positive comments, praising Dr Mahathir for his "spectacular comeback"
"My sincere congratulations to Dr Mahathir Mohamed on his spectacular comeback. The power of the people has spoken loud and clear that they do not only remember his outstanding legacy but needed his leadership.
"From my experience by having the honour of working closely with him, I am confident that he would lead the Alliance of Hope and Malaysia into the successful future.
"His leadership would undoubtedly reinvigorate ASEAN as well as ideas and visions that he helped shape. I am certain that all the Thai people share my sentiment and respect towards him," Thaksin tweeted along with a photo of himself with Dr Mahathir.
Imran Khan, Chairman of the Pakistan Tehreek-e-Insaf, also took to his official Twitter account to congratulate Tun M and Malaysians
"Congratulations to Mahathir and the people of Malaysia," the PTI Chairman tweeted.
Prior to that, Imran Khan added that the "corruption of Malaysian PM Najib Razak was the major reason Mahathir came out of a 15-year retirement to win elections despite attempts by Najib government to manipulate the same."
Several other world leaders took to their Twitter accounts to comment on the GE14 results and at the same time praising the change in the Malaysian government for the first time in six decades
Speaking of change, Dr Mahathir today revealed that once Anwar receives a full pardon, he will be "free to participate fully in politics":