A panel of nine women and eight men was chosen. Twelve will comprise the actual jury - seven women and five men - and five will be alternates when court resumes Tuesday morning for opening arguments.
Anthony, 25, is accused of killing her 2-year-old daughter, who was last seen alive in June 2008. Anthony has pleaded not guilty to the charges.
The grueling 11 days of jury selection was lengthened on Friday by another round of drama when an outburst from a courtroom spectator brought proceedings to a halt.
A woman in the courtroom gallery yelled, "She killed somebody, anyway," as jurors were being questioned.
The outburst forced Judge Belvin Perry, who is presiding over the trial, to call for a hold. The woman held tennis shoes tied together and said, "I'm sorry," as deputies quickly escorted her out of the Clearwater, Fla., courtroom and into a holding room.
The woman, later identified by local media as Elizabeth Ann Rogers, 29, of St. Petersburg, was brought back into the courtroom to face the judge.
"I'm mentally challenged," she sobbed. "I have a 3 year-old son. I've never been to court like this."
"My fiance is in jail for domestic violence," she said.
Judge Perry found Rogers in contempt and ordered that she be taken into custody. She was sentenced to two days in jail, although Perry told her she could have received as many as 179 days.
The outburst not only caused a delay in the jury selection proceedings but the loss of a juror from the trial's already dwindling juror pool. Perry excused another juror because she had witnessed the outburst.
Jury selection had already suffered several hiccups this week, but Perry told the courtroom he planned to swear in jurors by the end of the day.
The slow pace and high drama of selecting 12 jurors was in keeping with the tone of the entire case. Court rules would have allowed for up to eight alternate jurors, but the defense and prosecutors could not agree on candidates.
On Thursday, Perry was forced to bring in a brand new pool of 30 jurors after prosecutors and defense attorneys had spent the past two weeks interviewing and screening more than 150 potential jurors from the first pool.
"The well runs dry," Perry said.
While some of the delays have been procedural, most have come from the high-profile nature of the case, as well as the hardships of a trial that could last as long as eight weeks. The story of Casey Anthony has been in the headlines since her daughter was first reported missing nearly three years ago.
Caylee Anthony had been missing for a month before Anthony told anyone, and when she did, it was her mother, who called 911. Anthony told police she had not seen Caylee since dropping her off with a babysitter.
Her daughter's skeletal remains were found in December, less than a mile from the home the child and her mother shared with the toddler's grandparents. The little girl's death was ruled a homicide of undetermined means.
Jury candidates with strong opinions on the case, such as "I could not lay that [my guilty opinion] aside," were almost immediately rejected.
Jurors ultimately selected for the case will be sequestered away from their families for as long as eight weeks, and may ultimately decide whether Casey Anthony lives or dies.
"The reality is this is a death penalty case and you don't want a misstep," said Grace. "It's going to take a long time and that's just a bitter pill the judge, the lawyers and the jurors have to swallow."
The Associated Press contributed to this story.