The leaders of North and South Korea have met for the first time in 10 years.
North Korea’s Kim Jong-un and South Korea’s Moon Jae-in shook hands at the border. They then held hands as they crossed the military line between the two countries.
This is the first time a North Korean leader has set foot in the country of South Korea in 65 years.
In 1953, following the Korean War, the countries agreed an armistice – which is when warring countries agree to stop fighting.
It was that war which split Korea into two; North and South.
The two leaders have now said they will formally agree a peace treaty by the end of the year.
Over the last few months North Korea has been making efforts to start friendlier talks with its neighbour.
In January 2018 a secure phone line was reopened allowing the two government’s to talk to one another.
North Korea sent a team to the 2018 Winter Olympics in the South Korean city of Pyeongchang.
North and South Korea also put on a show of unity during the Olympic opening ceremony, with their athletes entering the stadium under the same flag.
The flag showed the outline of both countries joined together.