Exhibit

KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below does hereby make, constitute and appoint each of Angela K. Fontana and Matthew E. Winter, as his true and lawful attorney-in-fact and agent with all power and authority on his behalf to sign his name, in any and all capabilities, Form S-3 registration statements of Allstate Life Insurance Company pertaining to, but not limited to, The Allstate Advisor Variable Annuities - Allstate Advisor, Allstate Advisor Plus, Allstate Advisor Preferred; The Allstate Variable Annuities - Allstate Variable Annuity, Allstate Variable Annuity - L Share; The Allstate Advisor Variable Annuities - Advisor, Advisor Preferred; AIM Lifetime Plus II Variable Annuity; AIM Enhanced Choice Variable Annuity; The Allstate Provider Suite Variable Annuities; The Allstate Provider Variable Annuity Series - The Allstate Provider Advantage Variable Annuity, The Allstate Provider Ultra Variable Annuity, The Allstate Provider Extra Variable Annuity; AIM Lifetime America Variable Annuities Series - AIM Lifetime America Classic, AIM Lifetime America Regal, AIM Lifetime America Freedom; The STI Classic Variable Annuity; and AIM Lifetime Plus Variable Annuity.

This grant of authority extends to any and all amendments to such registration statements, and also grants such attorneys-in-fact full power to appoint a substitute or substitutes to act hereunder with the same power and authority as said agent and attorney-in-fact would have if personally acting.

KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below does hereby make, constitute and appoint each of Matthew E. Winter and Mario Imbarrato, as her true and lawful attorney-in-fact and agent with all power and authority on her behalf to sign her name, in any and all capabilities, Form S-3 registration statements of Allstate Life Insurance Company pertaining to, but not limited to, The Allstate Advisor Variable Annuities - Allstate Advisor, Allstate Advisor Plus, Allstate Advisor Preferred; The Allstate Variable Annuities - Allstate Variable Annuity, Allstate Variable Annuity - L Share; The Allstate Advisor Variable Annuities - Advisor, Advisor Preferred; AIM Lifetime Plus II Variable Annuity; AIM Enhanced Choice Variable Annuity; The Allstate Provider Suite Variable Annuities; The Allstate Provider Variable Annuity Series - The Allstate Provider Advantage Variable Annuity, The Allstate Provider Ultra Variable Annuity, The Allstate Provider Extra Variable Annuity; AIM Lifetime America Variable Annuities Series - AIM Lifetime America Classic, AIM Lifetime America Regal, AIM Lifetime America Freedom; The STI Classic Variable Annuity; and AIM Lifetime Plus Variable Annuity.

KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below does hereby make, constitute and appoint each of Angela K. Fontana and Matthew E. Winter, as her true and lawful attorney-in-fact and agent with all power and authority on her behalf to sign her name, in any and all capabilities, Form S-3 registration statements of Allstate Life Insurance Company pertaining to, but not limited to, The Allstate Advisor Variable Annuities - Allstate Advisor, Allstate Advisor Plus, Allstate Advisor Preferred; The Allstate Variable Annuities - Allstate Variable Annuity, Allstate Variable Annuity - L Share; The Allstate Advisor Variable Annuities - Advisor, Advisor Preferred; AIM Lifetime Plus II Variable Annuity; AIM Enhanced Choice Variable Annuity; The Allstate Provider Suite Variable Annuities; The Allstate Provider Variable Annuity Series - The Allstate Provider Advantage Variable Annuity, The Allstate Provider Ultra Variable Annuity, The Allstate Provider Extra Variable Annuity; AIM Lifetime America Variable Annuities Series - AIM Lifetime America Classic, AIM Lifetime America Regal, AIM Lifetime America Freedom; The STI Classic Variable Annuity; and AIM Lifetime Plus Variable Annuity.

KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below does hereby make, constitute and appoint each of Angela K. Fontana and Matthew E. Winter, as his true and lawful attorney-in-fact and agent with all power and authority on his behalf to sign his name, in any and all capabilities, on Form S-3 registration statements of Allstate Life Insurance Company pertaining to, but not limited to, The Allstate Advisor Variable Annuities - Allstate Advisor, Allstate Advisor Plus, Allstate Advisor Preferred; The Allstate Variable Annuities - Allstate Variable Annuity, Allstate Variable Annuity - L Share; The Allstate Advisor Variable Annuities - Advisor, Advisor Preferred; AIM Lifetime Plus II Variable Annuity; AIM Enhanced Choice Variable Annuity; The Allstate Provider Suite Variable Annuities; The Allstate Provider Variable Annuity Series - The Allstate Provider Advantage Variable Annuity, The Allstate Provider Ultra Variable Annuity, The Allstate Provider Extra Variable Annuity; AIM Lifetime America Variable Annuities Series - AIM Lifetime America Classic, AIM Lifetime America Regal, AIM Lifetime America Freedom; The STI Classic Variable Annuity; and AIM Lifetime Plus Variable Annuity.

KNOW ALL MEN BY THESE PRESENTS, that the person whose signature appears below does hereby make, constitute and appoint each of Angela K. Fontana and Mario Imbarrato, as his true and lawful attorney-in-fact and agent with all power and authority on his behalf to sign his name, in any and all capabilities, Form S-3 registration statements of Allstate Life Insurance Company pertaining to, but not limited to, The Allstate Advisor Variable Annuities - Allstate Advisor, Allstate Advisor Plus, Allstate Advisor Preferred; The Allstate Variable Annuities - Allstate Variable Annuity, Allstate Variable Annuity - L Share; The Allstate Advisor Variable Annuities - Advisor, Advisor Preferred; AIM Lifetime Plus II Variable Annuity; AIM Enhanced Choice Variable Annuity; The Allstate Provider Suite Variable Annuities; The Allstate Provider Variable Annuity Series - The Allstate Provider Advantage Variable Annuity, The Allstate Provider Ultra Variable Annuity, The Allstate Provider Extra Variable Annuity; AIM Lifetime America Variable Annuities Series - AIM Lifetime America Classic, AIM Lifetime America Regal, AIM Lifetime America Freedom; The STI Classic Variable Annuity; and AIM Lifetime Plus Variable Annuity.