The two have joined Jennifer Garner in the film about a butter-carving tournament. Garner's character is vying for the title, but her chances of winning melt away when an adopted teen (Yara Shahidi) enters the contest. Silverstone portray the girl's adoptive mother, reports Variety.
Jackman, a former love interest of Garner's character, will reenter her life. 'Twilight''s Ashley Greene will play Garner's stepdaughter.
'Butter' has yet to announce the date it will churn in theaters.