South Africans were elated by the wonderful weed (known as "dagga" in the country) news, and took to Twitter to express their joy.
Justice Raymond Zonto, the deputy chief said the law banning the use of marijuana was unconstitutional.
Now, Twitter has been lit with joy since the ruling was handed down. It said the right to privacy "extends beyond the boundaries of a home".
Earlier today, the Constitutional Court - the country's highest judicial body - unanimously backed the lower court's decision.
Use of cannabis and medicinal marijuana has gained popularity in many parts of the world to ease suffering from cancer, glaucoma, HIV and AIDS, and other serious health conditions.
"This must be determined by parliament", he said.
The ruling says Parliament should change the law within 24 months. It will remain illegal to use cannabis in public, and to sell or supply it.
So how will South Africans get their cannabis?
The government must also decide what quantities are allowed per person, and it must strictly be based on "personal use", according to Zondo.
Still, South Africa's courageous new move is big news on the world stage, as more countries change their policies on cannabis, which has been realized as a medicinal, religious, fibrous, recreational plant of all trades. His judgment decriminalized some, however, not the use of marijuana in public, or marketing.
The Constitutional Court found that the ban on the private use and cultivation of dagga was unconstitutional.
Justice Zondo said he took into account worldwide law allowing the private use of marijuana at home. The Rastafarians in South Africa have also been ecstatic with the news of legalization.