The memoir is inspired by his famed "Rocky" character's running up the Philadelphia Museum of Art's steps in the 1976 film's legendary training montage
The ceasefire, for an initial period of three days, took effect shortly before midnight on Wednesday under a United Nations plan which aims to allow sorely needed aid to reach suffering civilians.
A Saudi-led Arab coalition intervened in March 2015 to support the government after rebels overran much of Yemen.
Saudi Arabia and Washington accuse Iran of arming the insurgents, charges Tehran denies.
Coalition spokesman Major General Ahmed Assiri told Al Ekhbariya state television that there had been "a certain number of violations which we are going to prove".
If they continue, he said, the coalition "will take appropriate measures".
Yemeni residents have had enough of failed truces.
"We want a lasting ceasefire," said Sadok Abdullah, 28, a resident of rebel-held Sanaa.
"They're mocking us with a three-day truce," said Ali Al Doush, a 32-year-old civil servant who has not been paid for three months.
"We want an end to the war."
Shortly after the truce began, the coalition said it "will abide by the ceasefire", which aims for "distribution of the greatest possible humanitarian and medical assistance" to Yemen's people, especially the besieged city of Taez.
It said it will continue an air and maritime embargo, to prevent weapons shipments to the rebels, and will maintain airborne reconnaissance.
The rebels' military spokesman, General Sharaf Lokman, said his forces will respect the ceasefire as long as "the enemy" also abides by it on land, sea and air.
However, he urged his fighters to be ready to retaliate against "all aggression".
A spokesman for pro-government forces also declared "respect for the truce" but similarly reserved the right of reply to violations.
The memoir is inspired by his famed "Rocky" character's running up the Philadelphia Museum of Art's steps in the 1976 film's legendary training montage
The Indian singer could be seen apologising to the Pakistani actor for not recognising her at first instance
The singer performed for over 54,000 fans
The actor known for his romance flicks in Bollywood has been on a hiatus for 9 years
Here are some thrilling ways to escape the summer heat and enjoy the indoors to the fullest
After a bout of torrential rain, Dubai has bounced back like no other city, with automotive events being organised in full swing and big announcements being made
Sounds of prayer 'hallelujah…praise the lord' filled the air as part of a religious ceremony marking the soft opening of the facility
Afghanistan rulers are absent at the UN Human Rights Council meeting as Taliban are not recognised by the global body