Mary-Louise Parker and Peter Sarsgaard now have a hand in The Slap.

The Weeds and Killing stars, respectively, have joined NBC’s miniseries about a family that falls apart after one man slaps another couple’s naughty child, our sister site Deadline reports.

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Sarsgaard will play Hector, cousin to the slapper. Hector is a husband and father tempted by his wife’s teenage receptionist during a party.

Parker’s role, Anouk, is a head writer who’s dating the series’ young leading man. Anouk and Hector are good friends.

The Slap is the Peacock Net’s eight-hour take on a 2011 Australian series. Jon Robin Baitz (Brothers & Sisters) will pen the project; Baitz also will executive-produce with director Lisa Chodolenko (Olive Kitteridge), Tony Ayres and Crossbones‘ Walter Parkes, Laurie MacDonald and Ted Gold.