In addition to the jail stint – her fourth – the 24-year-old Mean Girls starlet will be required to carry out 480 hours of community service.
Lohan’s lawyer vowed to appeal against the sentence, and she was freed on $75,000 (£45,413) bail yesterday.
The violation stems from an accusation Lohan stole a $2,500 necklace from a California jewellery store in January.
Los Angeles Superior Court Judge Stephanie Sautner reduced the initial felony grand theft charge to a misdemeanour.
The judge sentenced her to jail after ruling prosecutors had presented sufficient evidence of the jewellery theft to show Lohan had violated terms of her probation.
Judge Sautner said Lohan had only returned the necklace after learning police had obtained a search warrant to find it.
Lohan will perform community service at a women’s centre and at the Los Angeles morgue.
