September 19, 2012 06:00 AM

Pregnancy cravings?

Megan Fox and Brian Austin Green stepped out for lunch together on Thursday at Casa Vega in Los Angeles.

“They were very nice, and she looked very cute pregnant,” an onlooker tells PEOPLE.

The parents-to-be enjoyed guacamole, taquitos, tortilla soup and cheese enchiladas.

Although the couple is expecting their first child together, the Transformers star is already a stepmom to Green’s 10-year-old son, Kassius Lijah.

– Jennifer Garcia

NEXT: Miley Cyrus & Liam Hemsworth’s ‘Affectionate’ Dinner in L.A.

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