Film stars Julia Roberts, Matthew McConaughey and Halle Berry are among the first presenters announced for this month’s Emmy Awards ceremony. In a statement Monday, executive producer Don Mischer said 13 celebrities have been confirmed so far as trophy presenters for the Aug. 25 awards. The 66th Emmy Awards, with host Seth Meyers, will air on NBC and on a Monday instead of the ceremony’s usual Sunday. The switch was made to avoid a conflict with NBC’s “Sunday Night Football” as well as the MTV Video Music Awards.