Mandy Moore's multitasking might be confusing for her 2-month-old son, Gus. The 37-year-old actress took to her Instagram Stories on Thursday in makeup to play the older version of her character, Rebecca Pearson, to share that she had finished filming the fifth season of her hit NBC family drama,. «That's a wrap from season 5, now I'm just feeding my child,» she said, smiling while breastfeeding.