More than 15,000 people are expected to attend the Iverk Show in Piltown, Co Kilkenny, today.
Now in its 188th year, it is one of Ireland's oldest agricultural shows.
Showjumping, carriage driving, dog shows and All-Ireland horse and cattle competitions will take place along with fruit, flowers and vegetable competitions.
The annual show was founded in 1826.
46 are killed in mosque attack
Militants have targeted a Sunni mosque during prayers, killing at least 46 people and wounding more than 50 as members of the Islamic State group continue to push through that area of Iraq.
A suicide bomber first broke into the Musab bin Omair Mosque in Imam Wais village in Diyala province, 120km north-east of Baghdad, and detonated his explosives before gunmen rushed in and opened fire on worshippers.
Swedes sorry in anthem upset
A Swedish TV network has apologised to Costa Rica for using the Central American country's national anthem to promote a comedy show.
TV4 is using the anthem in a trailer for Parlamentet, a game show featuring some of Sweden's best-known comedians.
After receiving complaints from citizens living in Sweden, Costa Rica lodged a diplomatic protest, calling it a "grave disrespect to our national symbol."
Producers picked the tune from a music library because it was "beautiful and grand" but were not aware it was Costa Rica's anthem.
Cannibal case cop trial opens
A German police officer went on trial yesterday accused of strangling and chopping up a man he met in an internet chat forum devoted to cannibalism.
Detlev G, whose last name has not been released, is charged with the murder and defilement of a corpse after allegedly killing a 59-year-old businessman from Hannover last November.
Prosecutors say the Polish-born victim had fantasized about being eaten, but police had found no evidence that the suspect actually did so.